Document:

STOCK PLEDGE AGREEMENT

                  THIS AGREEMENT is entered into this 2nd of April 1999, by and
between Fred DEN, residing at 102 Glen Way, Syosset, New York 11791 (the
"Pledgor") and ATS MONEY SYSTEMS, INC., a Nevada corporation having its
principal address at 25 Rockwood Place, Englewood, New Jersey 07631 (the
"Pledgee").

                                    RECITALS

                  A. The Pledgor is the owner of 100,000 issued and outstanding
shares of common stock of the Pledgee (the "Shares") represented by certificate
No. 10041 (the "Certificate").

                  B. The Pledgor has delivered to the Pledgee his note in the
principal amount of $40,000 (the "Note"), a copy of which is attached hereto. As
a condition to acceptance of the Note by the Pledgee, the Pledgor has agreed to
pledge the Shares to the Pledgee as security for the payment of the Note.

                  NOW, THEREFORE, in consideration of the foregoing and other
good and valuable consideration, the Pledgor and the Pledgee agree as follows:

                                     TERMS

                  I. PLEDGE. The Pledgor hereby pledges, grants a security
interest in, mortgages, assigns, transfers, delivers, deposits, sets over and
confirms unto the Pledgee and its successors and assigns as collateral security
for the payment in full when due and payable of the Note and for the due and
punctual performance and observance by the Pledgor of the terms, covenants and
agreements on its part to be per- formed and observed under the Note the Shares
(all of the Shares and the Certificate, together with all other certificates,
shares, securities, property or monies as may from time to time be pledged
hereunder pursuant to the terms of Section 7 being hereinafter collectively
called the "Pledged Stock"). This is a bona-fide pledge to secure the Note,
which Note is with full recourse to the Pledgor.

                  II. DELIVERY OF THE SHARES. The Certificate representing the
Shares, duly endorsed in blank for transfer, has been delivered to the Pledgee.
The Pledgee shall not encumber or dispose of the Pledged Stock in any manner
whatsoever, except as stated herein.

                  III. WARRANTY. The Pledgor represents and warrants that the
Pledged Stock has been validly issued and is fully paid and nonassessable and
that the Pledgor owns the Pledged Stock free and clear of all equities, pledges,
liens, charges and encumbrances (except the pledge provided for herein), that
the Pledged Stock has been wholly owned for more than 2 years and that the
Pledgor has the right TO pledge the Pledged Stock as herein provided.

                  IV. WAIVER. This pledge shall not be affected by and the
Pledgor is hereby not to be released from its obligations to the Pledgee herein
created on account of any indulgence, extension, or change in the form,
maturity, rate of interest, or otherwise, of the Note, nor by want of
presentment, notice, protest or suit on the Note. No failure on the part of the
Pledgee to exercise, and no delay on the part of the Pledgee in exercising, any
right, power or remedy hereunder shall operate as a waiver thereof; nor shall
any single or partial exercise by the Pledgee or any right, power or remedy
hereunder preclude any other or further exercise thereof or the exercise of any
other right, power or remedy. The remedies herein provided are cumulative and
are not exclusive of any remedies provided by law.

<PAGE>

                  V. ACCELERATION. Upon failure of the Pledgor to keep and
perform its agreement to pay the Note when due, immediately after notice thereof
("Event of Default"), the Pledgee may, at its option, at once exercise its
rights hereunder.

                  VI. TERMINATION OF PLEDGE. When the Note has been paid and the
terms and covenants hereof and agreements of the Pledgor hereunder have been
performed in full, this Pledge Agreement shall terminate, and the Pledgee shall
forthwith assign, transfer and deliver to the Pledgor or its designees, without
representation, warranty or recourse, against appropriate receipts, all the
Pledged Stock, if any, then held by it in pledge hereunder.

                  VII. INCREMENTS AND ACCRUALS. In addition to the Certificates
and Shares pledged hereunder pursuant to Section 1, the Pledgor also pledges
hereunder, as additional collateral security, and agrees to forthwith deliver to
the Pledgee all shares, securities, moneys or property representing a dividend
on the Pledged Stock or representing a distribution or return of capital upon or
in respect of the Pledged Stock or any part thereof, or resulting from a
split-up, revision reclassification or other like change of the Pledged Stock,
or otherwise received in exchange therefor, and any subscription, warrants,
rights or options issued to the holders, or otherwise in respect, of the Pledged
Stock.

                  VIII. VOTING POWER, DIVIDENDS, ETC.

                  A. Unless and until an Event of Default has occurred the
Pledgor shall have the right to exercise all voting, consensual and other powers
of ownership pertaining to the Pledged Stock for all purposes not inconsistent
with the terms of this Pledge Agreement; PROVIDED, HOWEVER that the Pledgor
agrees that it will not vote the Pledged Stock in any manner that is
inconsistent with the terms of this Pledge Agreement; and

                  B. If any Event of Default shall have occurred, and whether or
not any holder of any of the Note exercises any available option to declare any
of the Note due and payable or seeks or pursues any other relief or remedy
available to such holder under this Pledge Agreement or the Note, the Pledgee
shall forthwith, without further act on the part of any person, have the sole
and exclusive right to exercise ALL voting, consensual and other powers of
ownership pertaining to the Pledged Stock and shall exercise such powers in such
manner as it, in its sole discretion, shall determine to be necessary,
appropriate or advisable, and, if the Pledgee shall so request in writing, the
Pledgor agrees to execute and deliver to the Pledgee such other and additional
powers, authorizations, proxies, dividends and other orders, and such other
documents, as the Pledgee may reasonably request to secure to the Pledgee the
rights, powers and authorities intended to be conferred upon the Pledgee by this
Subsection B.

                  IX. SALE OF PLEDIZED STOCK AFTER AN EVENT OF DEFAULT. If any
Event of Default shall have occurred, and the principal amount of any then
outstanding Note shall have been declared forthwith due and payable, then,
unless such Note at the time outstanding shall have been paid in full at the
time the notice provided for in Subsection A of this Section 9 shall be given or
at the time the suit provided for in Subsection B of this Section 9 shall be
begun, the Pledgee may, in its sole discretion, without any further demand,
advertisement or notice, except as expressly provided for in Subsection A of
this Section 9:

                  A. Sell the Pledged Stock, or any part thereof, in one or more
sales, (i) at public or private sale, conducted by any officer or agent of, or
auctioneer or attorney for, the Pledgee, at the Pledgee's place of business or
elsewhere, for cash, upon credit or for future delivery, and at such price or
prices as the Pledgee shall, in its sole discretion, determine, and the Pledgee
or any other holder of any of the Note may be the purchaser of any or all of the
Pledged Stock so sold; or (ii) in "brokers' transactions" (as such term in
defined in Rule 144 promulgated under the Securities Act of 1933) through the
Pledgee's then broker, in which event, the Pledgor agrees to execute and deliver
to the Pledgee and file with the Securities and Exchange Commission one or more
appropriate Forms 144. The Pledgee may, in its sole discretion, at any

                                       2
<PAGE>

such sale reasonably restrict the prospective bidders or purchasers as to their
number, nature of business and investment intention, including, without
limitation, a requirement that the persons making such purchases represent and
agree, to the satisfaction of the Pledgee, that they are purchasing the Pledged
Stock for their own account, for investment, and not with a view to the
distribution or resale of any thereof. Upon any such sale, the Pledgee shall
have the right to deliver, assign and transfer to the purchaser thereof the
Pledged Stock so sold. Each purchaser (including the Pledgee and any other
holder of any of the Note) at any such sale shall hold the Pledged Stock so
sold, absolutely free from any claim or right of whatsoever kind, including,
without limitation, any equity or right of redemption, of the Pledgor, which the
Pledgor hereby specifically waives, to the extent it may lawfully do so, all
rights of redemption, stay or appraisal which it has or may have under any rule
of law or statute now existing or hereafter adopted. The Pledgee shall give the
Pledgor at least ten (10) days' written notice of any such public or private
sale. Such notice, in case of public sale, shall state the time and place fixed
for such sale. Any such public sale shall be held at such time or times within
ordinary business hours as the Pledgee shall fix in the notice of such sale. At
any such sale, the Pledged Stock may be sold in one lot as an entirety or in
separate parcels. The Pledgee shall not be obligated to make any sale pursuant
to any such notice. The Pledgee may, without notice or publication, adjourn any
public or private sale from time to time by announcement at the time and place
fixed for such sale, or any adjournment thereof, and any such sale may be made
at any time or place to which the same may be so adjourned without further
notice or publication. In case of any sale of all or any part of the Pledged
Stock on credit or for future delivery, the Pledged Stock so sold may be
retained by the Pledgee until the selling price is paid by the purchaser
thereof, but neither the Pledgee nor any other holder of any of the Note shall
incur any liability in case of the failure of such purchaser to take up and pay
for the Pledged Stock so sold, and, in case of any such failure, such Pledged
Stock may again be sold under and pursuant to the provisions hereof; or

                  B. Proceed by a suit or suits at law or in equity to foreclose
this Pledge Agreement and sell the Pledged Stock, or any portion thereof, under
a judgment or decree of a court or courts of competent jurisdiction.

                  The Pledgee as attorney-in-fact pursuant to Section I I hereof
may, in the name and stead of the Pledgor, make and execute ALL conveyances,
assignments and transfers of the Pledged Stock sold pursuant to this Section 9,
and the Pledgor hereby ratifies and confirms all that the Pledgee as said
attorney-in-fact, shall do by virtue hereof. Nevertheless, the Pledgor shall, if
so requested by the Pledgee, ratify and confirm any sale or sales by executing
and delivering to the Pledgee, or to such purchaser or purchasers, all such
instruments as may, in the judgment of the Pledgee, be advisable for the
purpose.

                  The receipt by the Pledgee for the purchase money paid at any
such sale made by it shall be a sufficient discharge therefor to any purchaser
of the Pledged Stock, or any portion thereof, sold as aforesaid; and no such
purchaser (or his or its representatives or assigns), after paying such purchase
money and receiving such receipt, shall be bound to see to the application of
such purchase money or any part thereof or in any manner whatsoever be
answerable for any loss, misapplication or nonapplication of any such purchase
money, or any part thereof, or be bound to inquire as to the authorization,
necessity, expediency or regularity of any such sale.

                  X. APPLICATION OF PROCEEDS. The proceeds of any sale, or of
collection, of all or any part of the Pledged Stock shall be applied by the
Pledgee, without any marshalling of assets, in the following order:

                  A. To the payment of ALL of the costs and expenses of such
sale, including, without limitation, reasonable compensation to the Pledgee and
its agents, attorneys and counsel, and all other expenses, liabilities and
advances made or incurred by the Pledgee in connection therewith;

                                       3
<PAGE>

                  B. To the payment in full of the principal of and premium, if
any, and interest on the Note and all obligations of the Pledgor under the Note
and this Pledge Agreement;

                  C. To the payment to the Pledgor, its successors or assigns,
or to whomsoever may be lawfully entitled to receive the same or as a court of
competent jurisdiction may direct, or any surplus remaining from such proceeds
after all payments of the character referred to in Subsections A and B of this
Section 10 shall have been made.

                  XI. PLEDGEE APPOINTED ATTORNEY-IN-FACT . The Pledgee, its
successors and assigns, upon the occurrence of an Event of Default, is hereby
appointed the attorney-in-fact, with full power of substitution, of the Pledgor
for the purpose of carrying out the provisions of this Pledge Agreement and
taking any action and executing any instruments which such attorney-in-fact may
deem necessary or advisable to accomplish the purposes hereof, which appointment
as attorney-in-fact is irrevocable and coupled with an interest. The Pledgor
will indemnify and save harmless the Pledgee from and against any liability or
damage which it MAY incur, in good faith and without negligence, in the exercise
and per- formance of any of the Pledgee's powers and duties specifically set
forth herein.

                  XII. ADDITIONAL INSTRUMENTS AND Assurances. The Pledgor hereby
agrees, at its own expense, to execute and deliver, from time to time, any and
all further, or other, instruments, and to perform such acts, as the Pledgee may
reasonably request to effect the purposes of this Pledge Agreement and to secure
to the Pledgee, and to all persons who may from time to time be a holder of the
Note, the benefits of all rights, authorities and remedies conferred upon the
Pledgee by the terms of this Pledge Agreement. In the event that at any time
hereafter, due to any change in circumstances, including without limitation any
change in any applicable law, or any decision hereafter made by a court
construing any applicable law, it is, in the opinion of counsel for the Pledgee,
necessary or desirable to file or record this Pledge Agreement or any financing
statement respecting this Pledge Agreement or the pledge made hereunder, the
Pledgor agrees to execute and deliver any instruments that may be necessary or
appropriate to make such filing or recording effective.

                  XIII. BENEFIT. This Pledge Agreement shall be binding upon the
Pledgor and its respective successors and assigns. This Pledge Agreement is for
the benefit of ALL future holders of the Note, any of whom shall, without
further act, become a party hereto by becoming a holder of any portion of the
Note.

                  XIV. WAIVER, MODIFICATION OR CANCELLATION. Any waiver,
alteration or modification of any of the provisions of this Pledge Agreement or
cancellation or replacement of this Pledge Agreement shall not be valid unless
in writing and signed by the parties hereto.

                  XV. NEW Jersey Law to Govern. This Pledge Agreement shall be
interpreted and construed pursuant to and in accordance with the laws of the
State of New Jersey.

                  XVI. NOTICE. Any notice required to be given hereunder
pursuant to the provisions of this Pledge Agreement shall be in writing by
certified mail and mailed to the parties at the addresses stated in this Pledge
Agreement. Any change in the foregoing addresses of any of the parties hereto
shall be given to the other parties in writing in the manner provided
hereinabove.

                  XVII. ENTIRE AGREEMENT. This Pledge Agreement supersedes any
and all other agreements, either oral or in writing, between the parties hereto
with respect to the subject matter hereof and contains all of the covenants,
agreements, representations and other valid statements between the parties with
respect to such matter. Each party to this Pledge Agreement acknowledges that no
representations, inducements, promises or statements, orally or otherwise, have
been made by any party hereto or anyone acting on behalf of any party hereto
which are not embodied herein and agrees that no other agreement, covenant,

                                       4
<PAGE>

representation, inducement, promise or statement with respect to the subject
matter hereof not set forth in writing in this Pledge Agreement shall be valid
or binding.

                  XVIII. TIME of Essence. Time is of the essence in all matters
herein.

                  IN WITNESS WHEREOF, this Pledge Agreement has been executed on
the date above written.

"Pledgor"                     "Pledgee"

FRED Den                      ATS Money Systems
                              By: Gerard F. Murphy

STATE OF NEW JERSEY )

COUNTY OF Morris    ) : Ss.:

                  On this 2nd day of April, 1999, who, being by me duly sworn,
did say to me personally known who, being by me duly sworn, did say that he
signed the above Stock Pledge Ag reement.

                                        /s/
                                        --------------------------------
                                             Notary Public

                                       5MEDICORE , INC.

                               STOCK OPTION AGREEMENT

     AGREEMENT, dated this 31st day of January, 2000, between MEDICORE, INC.,
a Florida corporation (hereinafter called the "Company"), and MAINSTREET
IPO.COM INC. (hereinafter called the "Optionee").

                                    WITNESSETH:

     WHEREAS, the board of directors of the Company authorized the granting to
the Optionee an option ("Medicore Option") to purchase 100,000 shares of common
stock, par value $.01 per share ("Medicore Option Shares"), of the Company at
$3.00 per Medicore Option Share (the "Option Price"), such Medicore Option to
be exercisable for two years to January 30, 2002 ("Expiration Date"); and

     WHEREAS, the Optionee accepts said Medicore Option and agrees to be bound
by the terms and conditions set forth herein;

     NOW, THEREFORE, in consideration of the foregoing and of the mutual
covenants herein contained and other good and valuable consideration, the
receipt whereof is hereby acknowledged, the parties hereto, intending to be
legally bound hereby, agree as follows:

GRANT OF MEDICORE OPTION:  ADJUSTMENT OF MEDICORE OPTION SHARES
---------------------------------------------------------------

     1.1 The Company hereby issues a Medicore Option to purchase from the
Company, upon the terms and conditions herein, 100,000 Medicore Option Shares
for a consideration of the Option Price.

     1.2 The number of Medicore Option Shares above stated, and the Option
Price thereof, shall be subject to adjustment from time to time as provided
herein.

PAYMENT FOR MEDICORE OPTION SHARES
----------------------------------

     2.1 The Option Price for the Medicore Option Shares to be purchased
pursuant to each exercise of the within Medicore Option shall be paid to the
Company by the Optionee in full in cash or by certified or bank cashier's
check at the time of such exercise of the Medicore Option.

EXERCISE OF MEDICORE OPTION
---------------------------

     3.1 The within Medicore Option is exercisable only to the extent
provided herein during the term of this Medicore Option, which is for a
period of two (2) years, terminating at the close of business on the
Expiration Date.

<PAGE>

     3.2 The Company may delay the exercise of any Medicore Option if the
Medicore Option Shares are required to be listed, registered or qualified on
any securities or Nasdaq Stock Exchange under law.  The Company shall not be
obligated to deliver any Medicore Option Shares until such Medicore Option
Shares have been so listed, registered or qualified on any securities or
Nasdaq Stock Exchange (or authorized for listing, registration or qualifi-
cation upon official notice of such exchange).  However, any delay under
this Section 3.2 shall not extend, modify the exercisability of the Medicore
Option, or otherwise affect the Expiration Date.

     3.3 At least five (5) days prior to the date upon which any portion of
the Medicore Option is to be exercised, the Optionee shall deliver to the
Company written notice of its election to exercise all or part of the
Medicore Option, subject to the limitations provided herein, which notice
shall specify (i) the date and time for the exercise of the Medicore Option,
(ii) the number of Medicore Option Shares in respect of which the Medicore
Option is to be exercised, and (iii) the address to which the Medicore Option
Shares are to be mailed.  The date specified in such notice shall be a
business day and the time specified shall be during the regular business
hours of the Company.

     3.4 The Optionee shall, at the date and time specified in such notice,
pay the Company cash or other consideration acceptable to the Company, at
the principle office of the Company, the Option Price for the Medicore Option
Shares in respect of which the Medicore Option is being exercised, to wit,
the amount of the product of $3.00 (or such then adjusted Option Price)
times the number of Medicore Option Shares into which the Medicore Option is
being exercised.  The notice and payment shall be delivered in person or
shall be sent by registered mail, return receipt requested, to Daniel R.
Ouzts, Vice President and Treasurer of the Company, 2337 West 76th Street,
Hialeah, Florida 33016.  Upon timely and proper exercise of the Medicore
Option, the Company shall as soon as practicable and with all due expedition
deliver to the Optionee, who shall so have properly exercised the Medicore
Option, certificates registered in the name of such person representing the
number of Medicore Option Shares in respect of which the Medicore Option was
exercised, subject to the approval of any governmental or regulatory
authority required in connection with the authorization, issuance, sale or
transfer of such Medicore Option Shares.  Delivery shall be deemed effected
for all purposes when the Company's stock transfer agent shall have deposited
such Medicore Option Share certificate or certificates in the United States
mail, addressed as per the Optionee's notice.  If the Medicore Option is
exercised in part, a new Medicore Option for the balance of the unexercised
Medicore Option Shares will be issued by the Company to the Optionee.

     3.5 The Optionee shall not have any rights and privileges of a share-
holder of the Company in respect of any of the Medicore Option Shares
underlying the Medicore Option unless and until and only to the extent it, he
or she shall have properly exercised the Medicore Option and paid for the
Medicore Option Shares in accordance with the terms and provisions of this
Option Agreement.  The Medicore Option shall be considered exercised on the
date the notice and payment are delivered to or received by the Treasurer of
the Company; provided if payment is by check, the exercise date shall be the
date such check clears payment.  The Optionee shall have no rights with
respect to such Medicore Option Shares not expressly conferred by this Option
Agreement.

RESTRICTIONS ON EXERCISE OF MEDICORE OPTION AND SALE OF MEDICORE OPTION SHARES
------------------------------------------------------------------------------

     4.1 In addition to the limitations on the exercise of a Medicore Option
as provided in Sections 3.1 et seq. hereof, the within Medicore Option shall
not be exercisable if:

<PAGE>  2

          (a) The exercise thereof will involve a violation of any applicable
federal or state securities law; or

          (b) The exercise thereof will require registration under the
Securities Act of 1933, as amended (the "Act") of the Medicore Option Shares.

     4.2  (a) The Optionee acknowledges that the Medicore Option and underlying
Medicore Option Shares are not transferable without compliance with the
registration requirements of the federal and state securities laws or an
opinion of counsel for the Optionee has been received by and is satisfactory
to the Company to the effect that such registration is not required; any
determination in this connection by the Company shall be final, binding and
conclusive; that the Optionee has no right to transfer either the Medicore
Option or the underlying Medicore Option Shares; and

          (b) The Optionee understands that the Medicore Option and any
Medicore Option Shares with which the Medicore Option is exercised are being
issued to it pursuant to a non-public offering exemption under the Act, that
the Medicore Option Shares that may be issued upon exercise of the Medicore
Option shall have a legend on the face thereof indicating the restrictive
nature of the Medicore Option Shares in pertinent part as follows:  "The
shares of Common Stock represented by this certificate have not been
registered under the Securities Act of 1933 or under the securities laws of
any state and may not be sold or transferred except upon such registration or
upon receipt by the Company of an opinion of counsel satisfactory to the
Company that registration is not required"; and that such Medicore Option
Shares and the Medicore Option shall have stop transfer instructions issued
against the same.

     4.3 At the time of any exercise of the within Medicore Option, the
Optionee shall represent to and agree with the Company in writing that it, he
or she is acquiring the Medicore Option Shares in respect of which the
Medicore Option is being exercised for the purpose of investment and not with
a view to distribution.

     4.4 The Optionee agrees that it will not sell, assign, pledge, gift,
hypothecate, transfer, or otherwise dispose of any of the Medicore Option
Shares or the Medicore Option at any time under circumstances which would
require the filing of a registration statement in respect of such Medicore
Option or Medicore Option Shares under the provisions of the Act.

     4.5 The Company shall not be obligated to take any other affirmative
action in order to cause or facilitate the exercise of the Medicore Option or
the issuance of the Medicore Option Shares pursuant thereto to comply with any
state or federal law, rule or regulation.

CHANGES IN CAPITAL STRUCTURE
----------------------------

     5.1 Existence of this Medicore Option shall not impair the right of
the Company or its shareholders to make or effect any adjustments,
recapitalizations, reorganizations or other changes in the Company's capital
structure or its business, or any merger of consolidation of the Company or
the dissolution or liquidation of the Company, or any sale or transfer of all
or any part of its assets or business, or any issue of bonds, debentures,
preferred or prior preference stock ahead of or affecting the Common Stock of
the Company, or Common Stock of the Company, or any grant of options on its

<PAGE>  3

securities through any qualified or non-qualified stock plan or otherwise,
or any other corporate act or proceeding, whether of a similar character or
otherwise.

     5.2 Except as hereinafter expressly provided, the issuance by the Company
of shares of Common Stock of any class, for cash or property, or for labor or
services, either upon sale or upon the exercise of rights or warrants to
subscribe therefor, or upon conversion of shares or obligations of the Company
converted into such shares or other securities, shall not affect, and no
adjustment by reason thereof shall be made with respect to the Option Price,
or the number, class or price of the Medicore Option Shares then subject to
the Medicore Option.

     5.3 The only adjustment to the Medicore Option Shares are as follows:

          (a) If, at any time or from time to time after the date of this
Option Agreement and up through the Expiration Date ("Adjustment Period"),
the Company shall distribute to the holders of its Common Stock, with respect
to the Common Stock, without payment therefor, securities or property, other
than shares of the Common Stock of the Company, other than rights to purchase
shares of the Common Stock, and other than cash, then, and in each such case,
the Optionee, upon the proper and timely exercise of this Medicore Option,
shall be entitled to receive the securities and properties to which it would
have been entitled had it been a shareholder of record of the Medicore Option
Shares received upon such exercise of the Medicore Option at the time the
Company made such distribution of securities or property and had, during the
period from the date of this Medicore Option to and including the date of such
exercise, retained such Medicore Option Shares and the securities and
properties receivable by it during such Adjustment Period.  Notice of each
such distribution shall be forthwith mailed to the Optionee.

          (b) If the Company shall be consolidated with or merged into another
corporation or shall sell all or substantially all of its assets as part of a
reorganization within the meaning of the Internal Revenue Code or shall
reclassify or reorganize its capital structure (except a stock split or
combination covered by subparagraph (a) hereof), and in such transactions
holders of the Common Stock exchange their Common Stock for shares of stock
or other securities ("Transaction Securities") of the Company or another
corporation, receive additional Common Stock or other securities, or surrender
a portion of their Common Stock, then:

               (1) Except as provided in Section 5.3(b)(2) hereof, the
Optionee shall be entitled, in lieu of the Medicore Option, to an Option or
Options to purchase Transaction Securities in an amount (if any) equal to the
Transaction Securities that the Optionee would have received if the Optionee
had exercised the Medicore Option in full and held the Medicore Option Shares
to which the Medicore Option related at the time of such transaction.  The
Option Price per share or other unit of such Transaction Securities shall be
determined by dividing the Option Price by the number of shares or other units
(or the fraction of a share or other unit) of Transaction Securities into which
each share of common stock is converted or for which common stock is exchanged
in such transaction.

               (2) Notwithstanding any other provision hereof, the board of
directors of the Company may cancel the Medicore Option as of the effective
date of any transaction described in this Section 5.3(b); provided that (A)
notice of such cancellation shall have been given to the Optionee at least
thirty (30) days before the effective date of such transaction, and (B) the
Optionee shall have the right to exercise the Medicore Option during the
thirty (30) day period immediately preceding the effective date of such
transaction.

<PAGE>  4

MISCELLANEOUS
-------------

     6.1 The granting of this Medicore Option shall not impose upon the
Company any obligation to employ, retain or become affiliated with or
continue to employ, retain or be affiliated with the Optionee.  This Option
Agreement shall not be construed as preventing nor shall it prevent the
Company from terminating any agreement or other affiliation with the Company
or its affiliated companies that might exist with the Optionee.

     6.2 This Option Agreement shall be binding upon and inure to the benefit
of the Company and its successors and upon the Optionee and its, his and/or
her successors, assigns, including without limitation the estate of the
Optionee and the executors, administrators and/or trustees of such estate,
and any creditor, receiver, trustee in bankruptcy or representative of any
such Optionee; provided that the within Medicore Option shall be exercisable
only by the Optionee except as may be approved in writing by the Company.

     6.3 This Option Agreement shall be deemed to be made under and shall be
construed in accordance with the laws of the State of New Jersey.

     6.4 This Option Agreement is effective as of January 31, 2000 and,
unless sooner terminated in accordance with the terms hereof, shall remain
in effect until the Effective Date as provided herein.  No modification or
amendment of this Option Agreement shall become effective until such
modification or amendment shall have been approved by the board of directors
of the Company.

     6.5 The Company's obligation to deliver Medicore Option Shares is subject
to all the terms and conditions of this Option Agreement and shall be subject
to applicable federal, state and local tax withholding and reporting
requirements.

     IN WITNESS WHEREOF, the Company and the Optionee have each caused this
Option Agreement to be executed by its President, Vice President, or
Secretary and/or individually, as the case may be, thereunto duly authorized,
the day and year first above written.

                                       MEDICORE, INC.

                                          /s/ Thomas K. Langbein

                                       By---------------------------------
                                         Thomas K. Langbein, Chairman of
                                         the Board of Directors

                                       MAINSTREET IPO.COM INC.

                                          /s/ Joseph Salvani

                                       By---------------------------------
                                         Joseph Salvani, President

Date: JANUARY 31, 2000

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00006-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00006-of-00352.parquet"}]]