<PAGE>

                                                                   EXHIBIT 10.35


                             BUY.COM TOUR AGREEMENT
                             ----------------------

     THIS AGREEMENT ("Agreement") is made and entered into as of the 25th day of
October, 1999 (the "Effective Date") by and between PGA TOUR, INC., a Maryland
corporation ("TOUR"), and BUY.COM, INC., a Delaware corporation ("BUY.COM").

BACKGROUND FACTS
----------------

A. TOUR is the organization of certain professional tournament golfers of
worldwide stature that, among other things, sanctions and co-sponsors certain
professional golf tournaments (the "PGA TOUR," "SENIOR PGA TOUR" and what is
currently referred to as the "NIKE TOUR").

B. BUY.COM is recognized in the electronic commerce industry.

C. BUY.COM and TOUR desire for BUY.COM to become the umbrella sponsor of the
professional golf circuit currently known as the NIKE TOUR and to have such tour
be renamed the BUY.COM TOUR.

D. Pursuant to the umbrella sponsorship of the BUY.COM TOUR, BUY.COM will
receive certain promotional rights, corporate hospitality benefits and media
exposure, subject to the terms and conditions set forth herein.

RECITAL OF CONSIDERATION
------------------------

   NOW, THEREFORE, in consideration of the mutual promises and covenants
herein contained and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, TOUR and BUY.COM hereby agree as
follows:
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AGREEMENT OF THE PARTIES
------------------------

1. ACCURACY OF RECITALS.
   --------------------

   To the best of the parties' knowledge, the statements set forth above in
the section labeled "Background Facts" are true and correct. Neither party is
aware of any fact or circumstance that would render such statements misleading.

2. UMBRELLA SPONSORSHIP.
   --------------------

   2.1  Name.  BUY.COM acknowledges the existence of the professional golf
        ----
circuit owned and operated by TOUR which is currently known as the "NIKE TOUR"
(the "Professional Circuit"). TOUR and BUY.COM hereby agree that as of the
Effective Date, (i) BUY.COM shall become the exclusive umbrella sponsor of the
Professional Circuit, (ii) the Professional Circuit shall be renamed the BUY.COM
TOUR, and (iii) each individual event which is part of the BUY.COM TOUR (each a
"TOUR Event") shall include the BUY.COM name (e.g., BUY.COM Knoxville Open)
(such renamed Professional Circuit shall be referred to herein as the "BUY.COM
TOUR").

   2.2  Exclusivity.  BUY.COM shall have the exclusive right to have its name
        -----------
included in the title of the BUY.COM TOUR and in the title of each TOUR Event.
No other sponsor shall have its name or other identification included in the
name of the BUY.COM TOUR or in the name of any individual TOUR Event; provided
that, BUY.COM acknowledges and agrees TOUR shall have the right to sell other
non-title sponsorships associated with individual or multiple TOUR Events,
including, without limitation, presenting sponsorships (e.g., BUY.COM Knoxville
Open presented by Buick), so long as no such sponsors are "Competitors" (as such
term is defined in Exhibit A attached hereto), or are otherwise harmful to
                   ---------
the image or reputation of BUY.COM.

   2.3  BUY.COM TOUR Operation.  BUY.COM acknowledges and agrees that TOUR
        ----------------------
shall be solely responsible for all aspects of operating the BUY.COM TOUR,
including, without limitation, promulgating and enforcing BUY.COM TOUR
Tournament Regulations; provided that TOUR will solicit BUY.COM's advice and
counsel on all major

                                     Page 2
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elements of the BUY.COM TOUR, including feedback on issues including, but not
limited to, brand positioning, market scheduling, television strategy, and
promotion. Within fourteen (14) days of the Effective Date, a task force from
each party shall be created to oversee the initial transition and branding of
the BUY.COM TOUR. Thereafter during the "Term" (as defined herein), this task
force will meet on a quarterly basis to address various issues associated with
the BUY.COM TOUR. TOUR agrees to explore with BUY.COM the possibility of BUY.COM
selling newly created or existing but unsold sponsorship positions at TOUR
Events so long as any such arrangement results in a net increase in revenue for
the applicable TOUR Event.

   2.4  Events and Markets.
        ------------------

        2.4.1 Number of Events. In 1999, the Professional Circuit consisted of
the thirty (30) annual events listed on Exhibit B. During the Term, the parties
                                        ---------
agree to maintain the BUY.COM TOUR at a quality and number of events that is in
all respects comparable to or better than the 1999 Professional Circuit. TOUR
shall have the right to add new TOUR Events and extend the number of TOUR Events
on the BUY.COM TOUR beyond the current annual schedule of thirty (30), provided
such additional TOUR Events are of comparable or better quality to the events on
the 1999 Professional Circuit. References herein to the BUY.COM TOUR shall
include the thirty (30) TOUR Events on Exhibit B, any successors of such TOUR
                                       ---------
Events, and any new TOUR Events added to the BUY.COM TOUR. TOUR and
BUY.COM shall also analyze the possibility of establishing a number of "marquee"
events on the BUY.COM TOUR (similar to THE PLAYERS CHAMPIONSHIP on the PGA
TOUR). If in any year during the Term the number of TOUR events changes, the
parties agree to follow the procedures set forth on Exhibit C.
                                                    ---------

        2.4.2  Markets.  The parties hereto acknowledge and agree that TOUR
               -------
Events will take place in a wide variety of markets, generally characterized as
"mid-sized," where there is typically not a PGA TOUR or SENIOR PGA TOUR
tournament presence. TOUR will solicit information regarding, and consider
BUY.COM's objectives and desires with respect to, the markets in which the TOUR
Events are placed. Prior to the scheduling of all new TOUR Events, or the
relocation of an existing TOUR Event, TOUR will discuss with BUY.COM all

                                     Page 3
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market options and use commercially reasonable efforts to accommodate BUY.COM's
requests. The parties agree that they will focus their respective efforts
towards adding new TOUR Events of a caliber and quality that are comparable to,
or better than, TOUR Events played on the Professional Circuit in 1999.
Additionally, TOUR shall seek to increase the number of TOUR Events conducted at
Tournament Players Clubs.

             2.4.3  International Market Expansion.  In the event TOUR desires
                    ------------------------------
to expand the BUY.COM TOUR to include TOUR Events outside the United States,
TOUR will so notify BUY.COM in writing pursuant to the procedures set forth in
Exhibit D.
---------

             2.4.4  Purse.  TOUR agrees that during the Term, the purse levels
                    -----
for TOUR Events will be as set forth on Exhibit E.
                                        ---------

        2.5  PGA TOUR Access. TOUR agrees that it will not decrease the number
             ---------------
of opportunities for players on the BUY.COM TOUR to earn the right to play on
the PGA TOUR from the number of opportunities that existed on the 1999
Professional Circuit.

   3.   BUY.COM TOUR MARK.
        -----------------

        3.1  Creation of BUY.COM TOUR Logo.  TOUR and BUY.COM agree that the
             -----------------------------
logo attached hereto as Exhibit F shall be the official logo of the BUY.COM TOUR
                        --------
(the "BUY.COM TOUR Logo"). The BUY.COM TOUR Logo together with the word mark
BUY.COM TOUR shall be collectively referred to herein as the "BUY.COM TOUR
Mark". Neither party shall take any action to register the BUY.COM TOUR Mark
without the prior written approval of the other party.

        3.2  Use of BUY.COM TOUR MARK by TOUR.  During the Term and subject to
             --------------------------------
Sections 8 and 9, TOUR shall have the right to use, and shall use, the BUY.COM
TOUR MARK and/or BUY.COM TOUR name in connection with all activities associated
with the BUY.COM TOUR, including, but not limited to, marketing and media
materials. The parties acknowledge and agree that TOUR shall have the sole and
exclusive right to manufacture,

                                     Page 4
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distribute and sell BUY.COM TOUR merchandise and to allow other third parties to
accomplish these tasks (the "Merchandise"), and TOUR shall be entitled to retain
all revenue associated therewith; provided that (i) BUY.COM shall have the sole
and exclusive right to conduct all e-commerce sales or distribution of the
Merchandise, and to retain all revenues associated therewith, and (ii) TOUR
shall consider from time to time requests from BUY.COM to source Merchandise
through third party vendors, if such vendors can produce Merchandise of equal
quality at a lower price. In addition, TOUR shall make the Merchandise available
to BUY.COM, at prices equal to TOUR's cost for such merchandise, for electronic
distribution by BUY.COM. TOUR agrees that BUY.COM shall have a limited right to
sell Merchandise other than through on-line sales, subject to TOUR approval.
TOUR agrees that all uses of BUY.COM TOUR Mark outside the promotion and
sponsorship by BUY.COM TOUR or other than as expressly provided in this
Agreement shall be subject to BUY.COM's prior written approval.

        3.3  Rebranding Program.  TOUR shall implement a rebranding campaign,
             ------------------
regarding the BUY.COM TOUR and the BUY.COM TOUR MARK, the specifics of which are
attached hereto as Exhibit G.  As part of this rebranding effort, TOUR shall
                   ---------
create a new television institutional advertisement regarding the new BUY.COM
TOUR to be broadcast in a variety of TOUR television vehicles at TOUR's expense.
The schedule for television and other media spots for the first quarter of 2000
is also set forth on Exhibit G. Additionally, TOUR shall work closely with its
                     ---------
broadcast rights holders to ensure continued and correct usage of
in-program graphics, announcer mentions, leaderboard signage, and on-course
signage related to BUY.COM TOUR Events, players, and alumni, at TOUR's expense.

        3.4  Quality of Operation.  The parties acknowledge the goodwill which
             --------------------
TOUR and BUY.COM will develop in connection with the BUY.COM TOUR MARK.
Accordingly, the parties agree that each will not knowingly nor intentionally
take any actions which could adversely affect such goodwill as developed by TOUR
and BUY.COM.

        3.5  Quality Control.  All promotional or advertising material
             ---------------
containing the BUY.COM TOUR MARK shall be of a high quality that does not
derogate from or adversely affect the BUY.COM TOUR MARK or the goodwill and
reputation associated therewith.

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        3.6  Termination.  The parties acknowledge and agree that upon the
             -----------
expiration or the earlier termination of this Agreement for any reason, neither
party shall use the BUY.COM TOUR MARK in any manner (except by TOUR for
historical references to statistics, events, etc.).

   4.   MEDIA EXPOSURE.
        --------------

        4.1  BUY.COM TOUR Event Telecasts.  BUY.COM acknowledges that under
             ----------------------------
TOUR's current television agreements, which are in effect through the year 2002,
The Golf Channel has the exclusive rights to all TOUR Events, with a minimum
obligation to provide broadcast coverage of ten (10) TOUR Events annually, with
the season-ending BUY.COM TOUR Championship carried on The Golf Channel and Fox
Sports Net. The parties acknowledge that television coverage for the BUY.COM
TOUR after 2002 will be subject to new broadcast television agreements, which
will be negotiated by TOUR in 2001; provided that TOUR shall consult with
BUY.COM regarding ongoing negotiations and discussions for such television
coverage. TOUR will use its commercially reasonable best efforts in these
negotiations to maintain comparable, if not gain increased coverage of, the TOUR
Events. BUY.COM shall have the option to purchase advertising units within the
BUY.COM TOUR Event telecasts subject to the mutual agreement of BUY.COM and the
applicable broadcaster.

        4.2  Updates in PGA TOUR and SENIOR PGA TOUR Telecasts.  BUY.COM
             -------------------------------------------------
acknowledges that TOUR's current PGA TOUR television contracts and practice are
in effect through 2002 and SENIOR PGA TOUR television contracts and practice are
in effect through 2000. These existing television contracts provide for the
BUY.COM TOUR to receive event updates and upcoming event promotions in the
television coverage during most every PGA TOUR and SENIOR PGA TOUR event
throughout the year as set forth on Exhibit H.
                                    ---------

        4.3  International Television.  The television broadcasts that provide
             ------------------------
BUY.COM TOUR exposure through updates and promotions within PGA TOUR and SENIOR
PGA TOUR telecasts referenced in Section 4.2 above will continue to be
distributed

                                     Page 6
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internationally via TOUR's international television agreements. During the Term,
TOUR will ensure that this international exposure will continue for the term of
those agreements and any extensions, renewals or successor agreements. In
addition, TOUR will provide for such continued international exposure during the
Term by entering into new contracts, extensions or renewals of such
international television agreements.

        4.4  PGA TOUR.COM Exposure.  TOUR shall ensure that the BUY.COM TOUR
             ---------------------
MARK will receive prominent, above-the-fold exposure on the PGATOUR.com web site
(and any successor web site) (the "TOUR Site") during the Term, including,
without limitation, BUY.COM TOUR MARK utilization on the home page of the TOUR
Site; BUY.COM TOUR MARK utilization on all BUY.COM TOUR player biography,
statistics and tournament pages; BUY.COM TOUR MARK utilization on the BUY.COM
TOUR's live scoring pages; and BUY.COM TOUR MARK or name utilization in
substantial BUY.COM TOUR editorial features and/or promotions undertaken on the
TOUR Site. The BUY.COM TOUR MARK will be a hot link to the home page of the
BUY.COM TOUR section of the TOUR Site and TOUR and BUY.COM will establish a
mutually acceptable reciprocal, above the fold link between such page and
BUY.COM's web site.

        4.5  TOUR Media.  TOUR agrees that the BUY.COM TOUR will be featured
             ----------
prominently in all TOUR owned and/or controlled media that may exist at any time
during the Term, which currently includes the "Inside the PGA TOUR" and "Inside
the SENIOR PGA TOUR" television shows, "PGA TOUR Partners Magazine," the annual
TOUR Magazine insert in "Golf Magazine," and TOUR Media Guides and applicable
press releases. During the Term in any TOUR media where there is currently a
feature referring to NIKE TOUR, that feature will reference the BUY.COM TOUR,
including, without limitation, all of the "Inside the PGA TOUR" and "Inside the
SENIOR PGA TOUR" television shows which currently feature NIKE TOUR recaps
and/or promotions, shall continue as BUY.COM TOUR recaps and/or promotions
during the Term.

        4.6  Earned Media.  The BUY.COM TOUR will receive significant national
             ------------
and local media exposure through both television and print media during the
course of the

                                     Page 7
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BUY.COM TOUR's editorial and news coverage by third parties. TOUR will develop a
transitional rebranding campaign to be launched no later than January 1, 2000
for the media to editorially ingrain BUY.COM's position as the new umbrella
title sponsor.

        4.7  Media Value.   As set forth in this Section 4, certain facets of
             -----------
future BUY.COM TOUR media exposure are subject to future negotiations between
TOUR and third parties. The parties acknowledge and agree that the maintenance
and expansion of such media exposure is in their mutual best interests. TOUR
shall use its commercially reasonable best efforts to obtain comparable or
superior media value for the BUY.COM TOUR. In the event TOUR is unable to
provide comparable media value, TOUR will provide additional, comparable
exposure or value from its other media inventory. In the event TOUR is unable to
provide such additional value, TOUR shall provide an appropriate reduction in
the "Sponsorship Fee" (as defined herein), which shall be mutually agreed upon
by the parties.

   5.   ON-SITE EXPOSURE.
        ----------------

        5.1  BUY.COM TOUR Tournament Elements.  TOUR will place the BUY.COM TOUR
             --------------------------------
MARK prominently on all publications, merchandise, advertising and other
marketing elements associated with each individual TOUR Event, and TOUR will
place the BUY.COM TOUR MARK on the electronic scoreboards, tournament signage,
tickets, publications, pairing sheets, caddie vests, hole flags and volunteer
uniforms for each TOUR Event. TOUR will use commercially reasonable best efforts
to use the BUY.COM TOUR MARK on concessions cups and the like.

        5.2  Additional On-Site Opportunities.  At BUY.COM's election and
             --------------------------------
expense, BUY.COM shall have the right to showcase its products and services at
individual TOUR Event venues (including, without limitation, the opportunity to
present a BUY.COM TOUR on-line store via kiosks to tournament fans, on-site
coupon distribution, product sampling, etc. ). BUY.COM will choose the size and
location of such display areas (minimum size of 10' x 10'), subject to TOUR's
approval which shall not be unreasonably withheld.

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   6.   ADDITIONAL PROMOTIONAL VALUE FOR BUY.COM.
        ----------------------------------------

        6.1  Tickets.  Each year during the Term, BUY.COM will receive two
             -------
hundred (200) grounds credentials for each TOUR Event at no cost to BUY.COM. In
addition, each year during the Term, BUY.COM will receive, at no cost to
BUY.COM, an aggregate of two hundred (200) tournament credentials (each such
credential providing access to a tournament for one (1) week) for use at PGA
TOUR Events and SENIOR PGA TOUR Events. No more than one hundred twenty (120)
such credentials may be used on any one (1) TOUR, and no more than ten (10)
tickets may be used at any one (1) event. Additional credentials will be
provided through TOUR at the price paid by TOUR for such credentials.

        6.2  Pro-Am Spots.  Each year during the Term, BUY.COM will receive, at
             ------------
no cost, twelve (12) Pro-Am spots in the Official Wednesday Pro-Am of each TOUR
Event. BUY.COM may use its Pro-Am spots for any amateur player of reasonable
capability, at the discretion of BUY.COM. In addition, each year during the
Term, BUY.COM will receive an aggregate of four (4) Pro-Am spots on each of the
PGA TOUR and SENIOR PGA TOUR. Selection of such Pro-Am spots will be determined
by TOUR, after consultation with BUY.COM, provided that TOUR shall provide such
Pro-Am spots in at least two different events on each of the PGA TOUR and SENIOR
PGA TOUR. BUY.COM may purchase additional Pro-Am spots, subject to availability,
at the price paid by TOUR for such additional Pro-Am spots.

        6.3  TPC Club Membership.  At no cost to BUY.COM, BUY.COM will receive
             -------------------
one (1) corporate membership to the Tournament Players Club network providing
two (2) designees at any one (1) time who will be entitled to full membership
privileges at the Tournament Players Club at Sawgrass. Such membership
privileges shall permit the designees to play golf at the Tournament Players
Club at Sawgrass without the payment of initiation fees, annual membership fees
or greens fees and also allow the use of locker room facilities. The designees
may also bring or send guests to other Tournament Players Club facilities
worldwide, subject to the Bylaws of the Tournament Players Club at Sawgrass and
each other Tournament Players Club. Such corporate membership shall
automatically terminate and be deemed revoked

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as of the expiration or earlier termination of the Term. BUY.COM shall have the
right to change the designees upon thirty (30) days written notice to TOUR.

        6.4  Client Functions.  Each year during the Term, TOUR shall invite
             ----------------
        certain BUY.COM executives, at the discretion of TOUR, to TOUR's annual
client functions, so long as such functions remain in existence. The location
and activities of the client functions may change each year, but provide an
opportunity for networking with other TOUR sponsors.

        6.5  BUY.COM Hospitality.  Each year during the Term, TOUR shall provide
             -------------------
BUY.COM, at no cost, with an 18th hole hospitality tent or skybox (generally for
groups of fifty (50) including Clubhouse credentials with VIP access (or similar
hospitality)) at each BUY.COM TOUR Event. The specifics of each package is to be
determined by TOUR. Food and beverage for such hospitality area shall be at
BUY.COM's expense. BUY.COM may, from time to time, and subject to TOUR approval,
transfer or resell its hospitality inventory, BUY.COM pro-am spots and/or TOUR
Event tickets to third parties, so long as such sales or transfers do not
adversely affect the applicable TOUR Event's sales of similar items.

        6.6  World Golf Championships Hospitality.  Each year during the Term,
             ------------------------------------
and at no cost to BUY.COM, TOUR shall provide BUY.COM an Embassy Row Hospitality
Tent (inclusive of food, beverages and forty (40) admission passes for each of
the following three (3) days (Wednesday, Friday and Sunday)) at the World Golf
Championships Andersen Consulting Match Play Championship in Carlsbad,
California, for so long as that event shall continue to be played in Carlsbad
during the Term. If the tournament is not played in Carlsbad, California, TOUR
will provide comparable hospitality at a mutually acceptable alternative PGA
TOUR event.

   7.  CONSUMER PROMOTIONAL PROGRAMS.  BUY.COM shall have the right to conduct
       -----------------------------
consumer promotions around a BUY.COM TOUR theme, including print, radio,
television and Internet advertising. These promotions may include hospitality or
ticket giveaways, sweepstakes opportunities, etc. (all in accordance with
existing TOUR policies that have been previously provided to BUY.COM and all
applicable laws). All such promotions are

                                    Page 10
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subject to TOUR's prior approval, such approval not to be unreasonably withheld.
BUY.COM shall also have the right to use the designation "Official Online
Superstore of the PGA TOUR", or such other designation that is mutually agreed
upon by TOUR and BUY.COM (the "Designation") solely in conjunction with the
BUY.COM brand. Use of the Designation shall be subject to a separate mutually
acceptable license agreement.

   8.  USE OF BUY.COM MARKS.
       --------------------

        8.1 License. For the Term of this Agreement, BUY.COM hereby grants to
TOUR a fully-paid, nonexclusive, nontransferable, nonsublicensable, royalty-
free, worldwide license to use the trademarks of BUY.COM attached hereto as
Exhibit I, for which BUY.COM is the sole owner (the "BUY.COM MARKS") alone and
---------
as part of the BUY.COM TOUR MARK and solely in accordance with this Agreement.

        8.2 Proprietary Markings. TOUR hereby agrees to ensure that all
trademark and other proprietary notices of BUY.COM affixed to or displayed on
the BUY.COM MARKS will not be removed, obscured or modified; except that, with
respect to the BUY.COM TOUR Mark only, such proprietary notices shall only be
included adjacent to the exterior of the BUY.COM TOUR MARK.

        8.3 BUY.COM Trademarks. TOUR acknowledges that BUY.COM is the owner of
all right, title and interest in and to the BUY.COM MARKS, together with any new
or revised names, designs or designations that BUY.COM may adopt during the
Term, and TOUR agrees not to use the BUY.COM MARKS in any manner whatsoever
except as expressly provided in this Agreement. In addition, BUY.COM shall
provide TOUR with the specifications, style and other requirements for the use
of the BUY.COM MARKS (the "Specifications"), attached hereto as Exhibit I. TOUR
                                                                ---------
shall abide by the Specifications when using the BUY.COM MARKS. TOUR
shall execute any documents reasonably requested by BUY.COM to assist BUY.COM in
the prosecution, maintenance, protection or defense of the BUY.COM MARKS.

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        8.4 Use Guidelines. Subject to the foregoing, BUY COM acknowledges and
agrees that TOUR shall not be required to obtain approval from BUY.COM for any
day to day uses by TOUR of the BUY.COM TOUR MARK (provided they are used in
accordance with this Agreement and the terms and conditions of Section 9
herein). Any other use of the BUY.COM MARKS is subject to the following: (a)
they must be used solely in accordance with the Specifications, and (b) such use
shall be subject to prior written approval of BUY.COM, in accordance with the
procedures set forth below in this paragraph. In addition, in advance of any
dissemination or use by TOUR of any: (i) art work involving the BUY.COM MARKS;
or (ii) advertising or promotional material or literature bearing the BUY.COM
MARKS, TOUR, at its own expense, shall submit one (1) sample of each such art
work, advertising or promotional material or literature to BUY.COM, at the
address specified by BUY.COM in accordance with this Agreement, for its prior
approval. BUY.COM shall have ten (10) business days after receipt of any such
sample during which to approve or disapprove the proposed use or design. If
BUY.COM does not notify TOUR of its disapproval of any such proposed use or
design on or before the conclusion of such ten (10) business day period, BUY.COM
shall be deemed to have approved such proposed use or design. BUY.COM shall not
unreasonably withhold approval. If any such proposed usage is disapproved by
BUY.COM, along with its notice of disapproval, BUY.COM shall supply TOUR with
written notice of the specific reasons for such disapproval, but in any event
BUY.COM's decision shall be final and TOUR shall abide by any such disapproval
of BUY.COM. TOUR shall have the right to resubmit modified materials.

        8.5 Quality of Operation. TOUR acknowledges the goodwill which BUY.COM
            --------------------
has developed in connection with the BUY.COM MARKS. Accordingly, TOUR agrees
that it will not knowingly and intentionally take any actions which could
adversely affect such goodwill as developed by BUY.COM.

        8.6 Reservation of Rights. All right, title and interest to the BUY.COM
            ---------------------
MARKS, and other intellectual property and proprietary rights associated
therewith other than those specifically granted herein, shall at all times
remain that of BUY.COM for its own exclusive use and benefit, and all use of the
BUY.COM name and BUY.COM MARKS shall inure solely to the benefit of BUY.COM.
TOUR understands and agrees that upon the expiration

                                    Page 12
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or the earlier termination of this Agreement for any reason, all of its rights
and interests granted herein in the BUY.COM MARKS and any other intellectual
property of BUY.COM shall cease, and all such rights and interests shall revert
to BUY.COM.

        8.7 Quality Control. All promotional or advertising material containing
            ---------------
the BUY.COM MARKS shall be of a high quality that does not derogate from or
adversely affect the BUY.COM MARKS or the goodwill and reputation associated
therewith.

        8.8 No Prejudice of Trademarks. TOUR agrees that it will not use at any
            --------------------------
time during the Term any other trademark, brand name, trade name, symbol, design
or the like that BUY.COM reasonably believes is similar to or possibly may be
confused with the BUY.COM MARKS. TOUR will not intentionally take any action
that will harm or prejudice the BUY.COM MARKS or BUY.COM's rights therein in any
way. TOUR agrees not to apply for registration anywhere in the world of any
trademarks of BUY.COM, including the BUY.COM MARKS or any mark confusingly
similar thereto, and TOUR also agrees not to use or contest, during or after the
term of this Agreement, the BUY.COM Marks or any other trademark or logo adopted
by BUY.COM, so long as such logos are not confusingly similar to any marks used
by TOUR.

        8.9 Change of BUY.COM MARKS. In the event BUY.COM desires to change the
            -----------------------
BUY.COM MARKS, BUY.COM shall notify TOUR of the change (the "Change Notice").
TOUR shall implement the change within the BUY.COM TOUR MARK and all of its uses
where possible within twelve (12) months of TOUR's receipt of the Change Notice.
BUY.COM shall reimburse TOUR for fifty percent (50%) of the actual costs of
implementing such change.

   9.   USE OF BUY.COM TOUR MARK.  BUY.COM agrees that all uses of the BUY.COM
        ------------------------
TOUR MARK by BUY.COM shall be subject to the prior approval of TOUR, except that
specific uses, as well as categories or types of uses, that are approved once
will not require separate approval in each instance, and internal BUY.COM uses
shall not require approval. In advance of any dissemination or use by BUY.COM of
any: (i) art work involving

                                    Page 13
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the BUY.COM TOUR MARK; or (ii) advertising or promotional material or literature
bearing the BUY.COM TOUR MARK, BUY.COM, at its own expense, shall submit one (1)
sample of each such art work, advertising or promotional material or literature
to TOUR at the address specified by TOUR in accordance with this Agreement. TOUR
shall have ten (10) business days after receipt of any such sample during which
to approve or disapprove the proposed use or design. If TOUR does not notify
BUY.COM of its disapproval of any such proposed use or design on or before the
conclusion of such ten (10) business day period, TOUR shall be deemed to have
approved such proposed use or design. TOUR shall not unreasonably withhold
approval. If any such proposed usage is disapproved by TOUR, along with its
notice of disapproval, TOUR shall supply BUY.COM with written notice of the
specific reasons for such disapproval, but in any event, TOUR's decision shall
be final and BUY.COM shall abide by any such disapproval of TOUR. BUY.COM shall
have the right to resubmit modified materials.

        9.1 Quality of Operation. The parties acknowledge the goodwill which
            --------------------

TOUR and BUY.COM will develop in connection with the BUY.COM TOUR MARK.
Accordingly, the parties agree that each will not knowingly and intentionally
take any actions with could adversely affect such goodwill as developed by TOUR
and BUY.COM.

        9.2 Reservation of Rights. The parties understand and agree that upon
            ---------------------
the expiration or the earlier termination of this
Agreement for any reason, all of the rights and interests granted herein in the
BUY.COM TOUR MARK shall cease, and neither party shall have any rights to or use
in any manner the BUY.COM TOUR MARK.

        9.3 Quality Control. All promotional or advertising material containing
            ---------------
the BUY.COM TOUR MARK shall be of a high quality that does not derogate from or
adversely affect the BUY.COM TOUR MARK or the goodwill and reputation associated
therewith.

        9.4 No Prejudice of Trademarks. BUY.COM agrees that, after prior written
            --------------------------
notice from TOUR, it will not use at any time during the Term any other
trademark, brand name, trade name, symbol, design or the like that TOUR
reasonably believes is similar to or possibly may be confused with the BUY.COM
TOUR MARK, excluding the "BUY.COM" portion

                                    Page 14
<PAGE>

thereof. BUY.COM will not intentionally take any action that will harm or
prejudice the BUY.COM TOUR MARK or either party's rights therein in any way.

   10.  TERM.
        ----

        10.1 The term of this Agreement shall commence as of the date of this
Agreement, and terminate on December 31, 2004, unless sooner terminated or
extended in accordance with this Section 10 (the "Term"); provided, however, the
parties acknowledge and agree that the renaming of the BUY.COM TOUR and the
operational aspects of this Agreement shall not begin until January 1, 2000.

        10.2 This Agreement will automatically terminate upon the occurrence of
any one (1) of the following events:

             (a) Upon the occurrence of certain events in accordance with
Section 11;

             (b) Upon an Event of Default as described in Section 13 hereof; or

             (c) Upon the termination or expiration of that certain E-Commerce
Agreement by and between TOUR and BUY.COM of even date herewith (the "E-Commerce
Agreement").

        10.3 Either party may terminate this Agreement immediately upon written
notice to the other party in the event that such other party is finally
adjudicated by a court of competent jurisdiction to have committed any act or
done anything which shall be an offense involving moral turpitude under federal,
state or local laws.

        10.4 Effect of Termination. In the event of termination of this
             ---------------------
Agreement by BUY.COM or TOUR, TOUR may only retain cash and common stock that in
the aggregate is equal to the Sponsorship Fees for the period that has expired
from January 1, 2000 until the

                                    Page 15
<PAGE>

effective date of termination (with part years pro-rated). For purposes of this
Section 10.4, the market value of the common stock shall be determined as
follows:

             (a) If traded on a national securities exchange or through the
     NASDAQ National Market, the value shall be deemed to be the average of the
     last reported sale or closing prices of the securities on such exchange or
     market over the last ten (10) trading days immediately prior to the
     effective date of termination);

             (b) If there is no active public market, the value shall be the
     fair market value thereof, as determined in good faith by Williamette
     Valuation (if separately engaged for this purpose) or such other
     independent auditor as the parties may mutually agree.

     Notwithstanding  the  foregoing,  in the event of any  termination  by TOUR
pursuant  to Section  11, the  provisions  of Section 11 shall  control and this
Section 10 shall have no effect. Any repurchase of BUY.COM stock by BUY.COM
shall be in  accordance  with the terms of that certain  Common  Stock  Issuance
Agreement  between  the  parties of equal date  herewith  (the  "Stock  Issuance
Agreement").

     11. SPONSORSHIP FEE.
         ----------------

         Subject to the terms and conditions of this Agreement, the parties
agree that the total Sponsorship Fee due for the five year Term shall be funded
by BUY.COM's issuance of 1,800,000 shares of BUY.COM Common Stock, payment of
$8.5 million upon completion of BUY.COM's initial public offering and securing a
$17 million letter of credit, all of which shall be subject to the terms and
conditions set forth on Exhibit J (the "Sponsorship Fee"). BUY.COM acknowledges
                        ---------
that TOUR's internal annual allocations of such funds are as set forth in
Exhibit K.
---------

     12. REPRESENTATIONS AND WARRANTIES.
         ------------------------------

                                    Page 16
<PAGE>

        12.1 By BUY.COM.  As a material inducement for TOUR to enter into this
             ----------
Agreement,  BUY.COM  represents  and  warrants  to TOUR  (and  unless  otherwise
specified,  such  representations  and warranties are true as of the date hereof
and will continue to be effective at all times,  as if  continuously  reiterated
through the Term) that:

             (a) BUY.COM is a corporation, duly organized and in good standing
under the laws of the State of Delaware. BUY.COM has full power and authority to
execute and deliver this Agreement and all documents now or hereafter to be
executed and delivered by it pursuant to this Agreement, and to perform all
obligations arising under this Agreement and under such other agreements. This
Agreement constitutes the legal, valid and binding obligation of BUY.COM,
enforceable in accordance with its terms, covenants and conditions against
BUY.COM; and

             (b) This Agreement does not contravene any provision of the
corporate powers of BUY.COM, any judgment, order, decree, writ or injunction, or
any provision of any applicable law or regulation, and the delivery of this
Agreement will not result in a breach of, constitute a default under, or require
consent pursuant to any credit agreement, lease, indenture, mortgage, deed of
trust, purchase agreement, guaranty or other instrument to which BUY.COM is a
party or by which BUY.COM or its assets are bound or affected.

        12.2  By TOUR.  As a material inducement for BUY.COM to enter into this
              -------
Agreement,  TOUR  represents  and  warrants  to BUY.COM  (and  unless  otherwise
specified,  such  representations  and warranties are true as of the date hereof
and will continue to be effective at all times,  as if  continuously  reiterated
through the Term) that:

             (a) TOUR is a corporation, duly organized and in good standing
under the laws of the State of Maryland. TOUR has full power and authority to
execute and deliver this Agreement and all documents now or hereafter to be
executed and delivered by it pursuant to this Agreement, and to perform all
obligations arising under this Agreement and under such other agreements. This
Agreement constitutes the legal, valid and binding obligation of TOUR,
enforceable in accordance with its terms, covenants and conditions against TOUR;
and

                                    Page 17
<PAGE>

             (b) This Agreement does not contravene any provision of the
corporate powers of TOUR, any judgment, order, decree, writ or injunction, or
any provision of any applicable law or regulation, and the delivery of this
Agreement will not result in a breach of, constitute a default under, or require
consent pursuant to any credit agreement, lease, indenture, mortgage, deed of
trust, purchase agreement, guaranty or other instrument to which TOUR is a party
or by which TOUR or its assets are bound or affected.

   13.  EVENTS OF DEFAULT; RIGHTS AND REMEDIES.  The occurrence of any one
        --------------------------------------
(1) or more of the following  events prior to the  expiration of the Term hereof
shall constitute an "Event of Default" hereunder:

        13.1 Default by either party in the performance or observance of any of
the material terms, agreements, covenants or conditions of this Agreement (other
than payment terms which are addressed in Section 11 above), which default
continues uncured for thirty (30) days after written notice thereof;

        13.2 The application by either party hereto (or its corporate parent)
for, or consent to, the appointment of a receiver, trustee, liquidator or
custodian (or similar official) of it or of all or a substantial part of its
assets, or if either party (or its corporate parent) shall: (i) make a general
assignment for the benefit of creditors; (ii) be adjudicated a bankrupt or
insolvent; (iii) file a voluntary petition in bankruptcy or a petition or an
answer seeking reorganization or any arrangement with creditors or to take
advantage of any insolvency law; (iv) file an answer admitting the material
allegations of a petition filed against it in any bankruptcy, reorganization or
insolvency proceeding; or (v) if any corporate action shall be taken by it for
the purpose of effecting any of the foregoing; or if an order, judgment or
decree shall be entered by any court or tribunal of competent jurisdiction
approving a petition seeking reorganization or appointing a receiver, trustee,
liquidator or custodian (or other similar official) of either party hereto (or
its corporate parent) or of all or a substantial part of its assets, and such
order, judgment or decree shall continue unstayed and in effect for a period of
thirty (30) consecutive days;

                                    Page 18
<PAGE>

        13.3  Any representation or warranty contained in this Agreement shall
be false or misleading in any material respect and remains uncorrected for
thirty (30) days after written notice thereof; or

        13.4  The occurrence of a material breach under the E-Commerce Letter
Agreement with a material breach by BUY.COM thereunder shall be deemed an Event
of Default by BUY.COM hereunder, and a material breach by TOUR thereunder shall
be deemed an Event of Default by TOUR hereunder.

   14.  PGA TOUR PLAYERS.  BUY.COM acknowledges that TOUR does not have the
        ----------------
right to use the name, signature, photograph or likeness of any PGA TOUR, SENIOR
PGA TOUR or BUY.COM TOUR player in connection with a commercial product or
service, including, without limitation, any product or service marketed by
BUY.COM, unless so authorized by the player. BUY.COM agrees that it will not
exercise the rights granted in this Agreement in any manner that constitutes an
endorsement of any commercial product or service by any PGA TOUR, SENIOR PGA
TOUR or BUY.COM TOUR player without having obtained proper advance written
authorization from such player. BUY.COM acknowledges that it shall be its
obligation to obtain any such written authorization.

   15.  INDEMNIFICATION.
        ---------------

                                    Page 19
<PAGE>

        15.1 BUY.COM covenants and agrees to indemnify and hold TOUR, and its
officers, directors, employees, agents and affiliated entities and their
respective officers, directors and employees (the "TOUR Indemnitees") harmless
from and against any and all losses, claims, damages, expenses, judgments,
awards, petitions, demands or liabilities (including, without limitation,
reasonable counsel and expert witness fees whether incurred in preparation for
trial, at trial, on appeal or in bankruptcy proceedings), joint or several, to
which any of the TOUR Indemnitees may become subject on account of any breach or
alleged breach or failure of any agreements, obligations, representations or
warranties of BUY.COM under this Agreement or any other act, omission or
representation by BUY.COM; provided that TOUR will notify BUY.COM promptly in
writing upon receipt of notice of any such claim and will tender to BUY.COM the
opportunity to defend and/or settle such claim at BUY.COM's expense and will
reasonably assist and cooperate with BUY.COM in defending and/or settling such
claim (so long as such settlement or culpability on the part of BUY.COM includes
(x) a general release of BUY.COM from all liability in connection therewith and
(y) does not contain any admission of wrongdoing or culpability on the party of
BUY.COM). TOUR shall not agree to the settlement of any such claim, action or
proceeding without the prior written consent of BUY.COM, which shall not be
unreasonably withheld.

        15.2 TOUR covenants and agrees to indemnify and hold BUY.COM, and its
officers, directors, employees, agents and affiliated entities and their
respective officers, directors and employees (the "BUY.COM Indemnitees")
harmless from and against any and all losses, claims, damages, expenses,
judgments, awards, petitions, demands or liabilities (including, without
limitation, reasonable counsel and expert witness fees whether incurred in
preparation for trial, at trial, on appeal or in bankruptcy proceedings), joint
or several, to which any of the BUY.COM Indemnitees may become subject on
account of any breach or alleged breach or failure of any agreements,
obligations, representations or warranties of TOUR under this Agreement or any
other act, omission or representation by TOUR; provided that BUY.COM will notify
TOUR promptly in writing upon receipt of notice of any such claim and will
tender to TOUR the opportunity to defend and/or settle such claim at TOUR's
expense and will reasonably assist and cooperate with TOUR in defending and/or
settling such claim (so long as such settlement or culpability on the party of
TOUR includes (x) a general release of TOUR

                                    Page 20
<PAGE>

from all liability in connection therewith and (y) does not contain any
admission of wrongdoing or culpability on the part of TOUR). BUY.COM shall not
agree to the settlement of any such claim, action or proceeding without the
prior written consent of TOUR, which shall not be unreasonably withheld.

   16.  CONFIDENTIALITY.  Except to the extent otherwise required by
        ---------------
applicable law, neither TOUR nor BUY.COM shall make any public disclosure of any
of the financial terms contained in this Agreement without the prior written
consent of the other party in each instance; provided, however, that either
party may, after providing advance written notice to the other party, disclose
the terms of this Agreement and/or the transactions contemplated hereby in any
filing made pursuant to the Securities Act of 1933 ( the "Securities Act") or
the Securities Exchange Act of 1934 (the "Exchange Act"), to the extent that
such party, after consultation with outside legal counsel, determines that such
disclosure is required under the Securities Act or Exchange Act, as applicable.

   17.  NO AGENCY OR JOINT VENTURE.   This Agreement shall not be construed as
        --------------------------
in any way establishing a partnership, joint venture, express or implied agency,
employer-employee or special fiduciary relationship between the parties hereto.

   18.  NOTICES.
        -------

        18.1  All notices, consents, requests and other communications hereunder
shall be in writing and shall be sent by hand delivery, by certified or
registered mail (return receipt requested), or by a recognized national
overnight courier service as set forth below:

             If to BUY.COM:  BUY.COM, INC.
                             85 Enterprise
                             Aliso Viejo, California  92656
                             Attn:  Greg Hawkins
                             Copy:  General Counsel

                                    Page 21
<PAGE>

             If to TOUR:    PGA TOUR, Inc.
                            112 PGA TOUR Boulevard
                            Ponte Vedra Beach, Florida  32082
                            Attn:  Commissioner

        18.2  Notices delivered pursuant to Section 18.1 shall be deemed given:
(i) at the time delivered, if personally delivered; (ii) at the time received,
if mailed; and (iii) one (1) business day after timely delivery to the courier,
if by overnight courier service.

        18.3  Any party hereto may change the address to which notice is to be
sent by written notice the other party in accordance with this Section 18.

   19.  MISCELLANEOUS.
        -------------

        19.1  This Agreement including all Exhibits hereto (all of which are
incorporated herein by this reference), contains the entire agreement and
understanding concerning the subject matter hereof between the parties hereto.

        19.2  No waiver, termination or discharge of this Agreement, or any of
the terms or provisions hereof, shall be binding upon either party unless
confirmed in writing. No waiver by either party hereto of any term or provision
of this Agreement or of any default hereunder shall affect such party's rights
thereafter to enforce such term or provision or to exercise any right or remedy
in the event of any other default, whether or not similar. This Agreement may
not be modified or amended except by a writing executed by both parties hereto.

        19.3  If any provision of this Agreement shall be held void, voidable,
invalid or inoperative, no other provision of this Agreement shall be affected
as a result thereof, and, accordingly, the remaining provisions of this
Agreement shall remain in full force and effect as though such void, voidable,
invalid or inoperative provision had not been contained herein.

                                    Page 22
<PAGE>

        19.4  This Agreement shall be governed by and construed in accordance
with the laws of the State of Delaware.

        19.5  Neither party hereto may assign this Agreement, in whole or in
part, without the prior written consent of the other party, and any attempted
assignment not in accordance herewith shall be null and void and of no force or
effort, provided that, either party may assign this Agreement to another
subsidiary or affiliate as part of a corporate reorganization or restructure, so
long as no third party owns a part of or otherwise controls such subsidiary or
affiliate.

        19.6  This Agreement shall be binding upon and shall inure to the
benefit of the parties hereto and their respective heirs, representatives,
successors and permitted assigns.

        19.7  Upon the reasonable request of the other party hereto, each party
agrees to take any and all actions, including, without limitation, the execution
of certificates, documents or instruments, necessary or appropriate to give
effect to the terms and conditions set forth in this Agreement.

        19.8  This Agreement may be executed in one or more counterparts, each
of which shall be deemed to be an original, but all of which together shall
constitute the same Agreement. Any signature page of any such counterpart, or
any electronic facsimile thereof, may be attached or appended to any other
counterpart to complete a fully executed counterpart of this Agreement, and any
telecopy or other facsimile transmission of any signature shall be deemed an
original and shall bind such party.

    IN WITNESS WHEREOF, each of the parties hereto has executed this
Agreement as of the date and year first above written.

                                    PGA TOUR, INC.


                                    By:
                                        W. William Calfee
                                        Executive Vice President

                                    Page 23
<PAGE>

                                     BUY.COM, INC.


                                     By:
                                         Greg Hawkins
                                         Chairman and Chief Executive Officer

                                    Page 24