EXHIBIT 10.15

Continuing Guaranty dated February 18, 2000 between Bank of America, NA and Greg
Manning

  Bank of America, National Association
 Continuing Guaranty

 BORROWER: SPECTRUM NUMISMATICS
                   INTERNATIONAL, INC.
GUARANTOR: GREG MANNING

To:     BANK OF AMERICA, NATIONAL
            ASSOCIATION
          231 South LaSalle Street
          Chicago. Illinois 60697

 I. Guaranty of Payment.  For value received and in consideration of any loan or
 other financial accommodation heretofore,  now or hereafter at any time made or
 granted to Spectrum Numismatics International, Inc. (the "Borrower") by BANK OF
 AMERICA,  NATIONAL  ASSOCIATION  (together with its successors and assigns, the
 "Bank"),  231 South LaSalle Street,  Chicago,  Illinois 60697,  the undersigned
 (the "Guarantor") hereby unconditionally guarantees the full and prompt payment
 when due, whether by acceleration or otherwise, and at all times thereafter, of
 all  obligations  of the Borrower to the Bank,  howsoever  created,  arising or
 evidenced,  whether  direct or  indirect,  absolute  or  contingent,  or now or
 hereafter  existing,  or due or to  become  due  (all  such  obligations  being
 hereinafter  collectively called the "Liabilities"),  and the Guarantor further
 agrees to pay all expenses and attorneys' fees, including the allocated cost of
 in-house  counsel,  paid or incurred by the Bank in  endeavoring to collect the
 Liabilities,   or  any  part  thereof,  and  in  enforcing  this  Guaranty.  2.
 Acceleration  of the Time of Payment of Amount Payable Under the Guaranty.  The
 Guarantor agrees that, in the event of the death, incompetency,  dissolution or
 insolvency of the Borrower or the  Guarantor,  or the inability of the Borrower
 or the Guarantor to pay debts as they mature,  or an assignment by the Borrower
 or the  Guarantor  for the  benefit of  creditors,  or the  institution  of any
 proceeding  by or against  the  Borrower  or the  Guarantor  alleging  that the
 Borrower or the  Guarantor  is insolvent or unable to pay debts as they mature,
 and if such event occurs at a time when any of the  Liabilities may not then be
 due and payable,  the Guarantor  will pay to the Bank forthwith the full amount
 which would be payable  hereunder by the Guarantor if all Liabilities were then
 due and payable.
 3. Security Interest in Deposits and Other Property.  To secure all obligations
 of the Guarantor hereunder, the Guarantor hereby grants to the Bank a lien upon
 and security  interest in any and all balances,  credits,  deposits (general or
 special, time or demand, provisional or final), accounts or moneys of or in the
 name of the Guarantor  now or hereafter  with the Bank and any and all property
 of  every  kind  or  description  of or in the  name  of the  Guarantor  now or
 hereafter,  for any reason or purpose whatsoever,  in the possession or control
 of,  or in  transit  to,  the Bank or any  agent or  bailee  for the Bank  (the
 "Collateral").  The Bank may, without demand or notice of any kind, at any time
 and from  time to time  when any  amount is due and  payable  by the  Guarantor
 hereunder,  appropriate  the Collateral and apply it toward the payment of such
 amount.
 4.  Continuing   Guaranty.   This  Guaranty  is  a  continuing,   absolute  and
 unconditional   Guaranty,   and  will   remain  in  full   force   and   effect
 (notwithstanding, without limitation, the death, incompetency or dissolution of
 the Guarantor or that at any time or from time to time all Liabilities may have
 been paid in full),  subject to discontinuance  only upon actual receipt by the
 Bank of written  notice from the Guarantor,  or any person duly  authorized and
 acting on behalf of the  Guarantor,  of the  discontinuance  hereof;  provided,
 however, that no such notice of discontinuance will affect or impair any of the
 agreements and  obligations of the Guarantor  hereunder with respect to any and
 all Liabilities  existing prior to the time of actual receipt of such notice by
 the Bank, any and all Liabilities  created or acquired  thereafter  pursuant to
 any previous  commitments  made by the Bank, any and all extensions or renewals
 of any of the foregoing,  any and all interest on any of the foregoing, and any
 and all expenses paid or incurred by the Bank in  endeavoring to collect any of
 the foregoing and in enforcing this Guaranty against the Guarantor;  and all of
 the  agreements  and  obligations  of the Guarantor  under this Guaranty  will,
 notwithstanding any such notice of discontinuance, remain fully in effect until
 all such Liabilities  (including any extensions or renewals of any thereof) and
 all such interest and expenses have been paid in full.
 5. Recision or Return of Payment on Liabilities.  The Guarantor  further agrees
that, if at any time all or any part of any payment  theretofore  applied by the
Bank to any of the  Liabilities  is or must be rescinded or returned by the Bank
for any  reason  whatsoever  (including,  without  limitation,  the  insolvency,
bankruptcy or  reorganization  of the Borrower),  such  Liabilities are, for the
purposes  of this  Guaranty,  to the  extent  that  such  payment  is or must be
rescinded or returned,  deemed to have  continued in existence,  notwithstanding
such application by the Bank, and this Guaranty will continue to be effective or
be reinstated,  as the case may be, as to such  Liabilities,  all as though such
application by the Bank had not been made.
 6. Bank Permitted to Take Certain Actions. The Bank may, from time to time (but
 is not  obligated  to),  whether  before  or after any  discontinuance  of this
 Guaranty, at its sole discretion and without notice to the Guarantor,  take any
 or all of the  following  actions:  (a)  receive  a  security  interest  in any
 property to secure any of the  Liabilities  or any  obligation  hereunder;  (b)
 retain  or obtain  the  primary  or  secondary  obligation  of any  obligor  or
 obligors, in addition to the Guarantor, with respect to any of the Liabilities;
 (c) extend or renew for one or more  periods  (whether  or not longer  than the
 original  period),  alter or  exchange  any of the  Liabilities,  or release or
 compromise any  obligation of the Guarantor  hereunder or any obligation of any
 nature of any other obligor with respect to any of the Liabilities; (d) release
 its security  interest in, or surrender,  release or permit any substitution or
 exchange for, all or any part of any property  securing any of the  Liabilities
 or any  obligation  hereunder,  or  extend  or  renew  for one or more  periods
 (whether or not longer than the original period) or release,  compromise, alter
 or exchange  any  obligations  of any nature of any obligor with respect to any
 such  property;  and (e)  resort to the  Guarantor  for  payment  of any of the
 Liabilities,  whether or not the Bank (i) has resorted to any property securing
 any of the  Liabilities  or any  obligation  hereunder  or (ii)  has  proceeded
 against any other obligor  primarily or  secondarily  obligated with respect to
 any of the Liabilities (all of the actions referred to in preceding clauses (i)
 and (ii) being hereby  expressly  waived by the Guarantor).  7.  Application of
 Payments. Any amounts received by the Bank from whatsoever source on account of
 the  Liabilities  may be  applied  by it  toward  the  payment  of  such of the
 Liabilities,  and in such  order of  application,  as the Bank may from time to
 time elect.
 8. Subrogation.  Until such time as this Guaranty has been discontinued and the
 Bank has  received  payment of the full  amount of all  Liabilities  and of all
 obligations of the Guarantor  hereunder,  no payment made by or for the account
 of  the  Guarantor   pursuant  to  this  Guaranty  entitles  the  Guarantor  by
 subrogation  or  otherwise to any payment by the Borrower or from or out of any
 property of the  Borrower,  and the  Guarantor  will not  exercise any right or
 remedy  against the  Borrower or any  property of the Borrower by reason of any
 performance by the Guarantor of this Guaranty.
 9. Waiver of Notice and Other Matters.  The Guarantor hereby expressly  waives:
 (a) notice of the  acceptance by the Bank of this  Guaranty;  (b) notice of the
 existence  or creation or  non-payment  of all or any of the  Liabilities;  (c)
 presentment,  demand,  notice  of  dishonor,  protest,  and all  other  notices
 whatsoever; and (d) all diligence in collection or protection of or realization
 upon the Liabilities or any thereof, any obligation hereunder,  or any security
 for or guaranty of any of the foregoing.
 10.  Covenants of Guarantor.  The Guarantor  covenants and agrees with the Bank
 that Guarantor:  (a) shall provide to the Bank, within 60 days of each December
 31, the Guarantor's  annual financial  statements in a form satisfactory to the
 Bank;  (b) shall provide to the Bank,  within 15 days of filing,  copies of the
 Guarantor's  federal income tax returns (with all forms K-l  attached),  and if
 requested by the Bank,  copies of any  extensions of the filing date; (c) shall
 not incur or permit to exist any  indebtedness or liens,  except (i) the amount
 of indebtedness in existence on the date of this Guaranty disclosed to the Bank
 in Guarantor's  financial  statement  dated November 30, 1999,  (ii) additional
 debts of the  undersigned  for  consumer  purposes  which do not exceed a total
 principal amount of $250,000,  (iii) additional debt  subordinated to the Bank,
 or (iv) any liens related to the foregoing,  unless  consented to in writing by
 the Bank;  (d) shall  promptly  notify the Bank in writing of any lawsuit  over
 $500,000  against  Guarantor;  (e) shall  maintain a Net Worth (as  hereinafter
 defined) of not less than $20,000,000;  (f) shall not pledge, assign,  encumber
 or otherwise  transfer ownership of Guarantor's stock in Greg Manning Auctions,
 Inc.  ("GMAI"),  which stock in the aggregate  exceeds nine percent (9%) of the
 total issued and outstanding  stock of GMAI; and (g) shall not sell,  assign or
 otherwise  transfer  the  Guarantor's  interest  in the  stock of GMAI,  unless
 consented to in writing by the Bank. For the purposes hereof, "Net Worth" means
 the  gross  fair  market  value  of  the  Guarantor's   assets  (excluding  all
 intangibles,  goodwill, patents, trademarks,  copyrights, trade names, start-up
 costs, non-compete covenants,  and other like intangibles,  and monies due from
 the  guarantors  of  the  obligations  of  the  Guarantor)   plus   liabilities
 subordinated  to the Bank in a manner  acceptable to the Bank (using the Bank's
 standard form) less total  liabilities,  including but not limited to estimated
 taxes on asset  appreciation  and any reserves or offsets against  assets.  11.
 Assignment of Liabilities.  The Bank may, from time to time,  whether before or
 after any  discontinuance  of this  Guaranty,  without notice to the Guarantor,
 assign or transfer any or all of the Liabilities or any interest therein;  and,
 notwithstanding any such assignment or transfer or any subsequent assignment or
 transfer thereof,  such Liabilities will remain Liabilities for the purposes of
 this  Guaranty,  and  each and  every  immediate  and  successive  assignee  or
 transferee of any of the  Liabilities  or of any interest  therein will, to the
 extent of the interest of such assignee or transferee  in the  Liabilities,  be
 entitled  to the  benefits  of this  Guaranty  to the  same  extent  as if such
 assignee or transferee were the Bank; provided,  however, that, unless the Bank
 otherwise  consents in writing,  the Bank has an  unimpaired  right,  prior and
 superior to that of any such assignee or transferee,  to enforce this Guaranty,
 for the benefit of the Bank, as to those of the Liabilities  which the Bank has
 not assigned or  transferred.  12.  Information  Concerning  the Borrower.  The
 Guarantor  hereby  warrants  to the Bank  that the  Guarantor  now has and will
 continue to have  independent  means of obtaining  information  concerning  the
 affairs, financial condition and business of the Borrower. The Bank has no duty
 or responsibility to provide the Guarantor with any credit or other information
 concerning the affairs,  financial  condition or business of the Borrower which
 may come into the Bank's possession.
 13. Waiver and Modifications.  No delay on the part of the Bank in the exercise
 of any right or  remedy  will  operate  as a waiver  thereof,  and no single or
 partial  exercise  by the Bank of any right or remedy  will  preclude  other or
 further exercise thereof or the exercise of any other right or remedy; nor will
 any modification or waiver of any of the provisions of this Guaranty be binding
 upon the Bank  except  as  expressly  set forth in a writing  duly  signed  and
 delivered on behalf of the Bank. 14.  Obligations Under Guaranty.  No action of
 the Bank permitted hereunder will in any way affect or impair the rights of the
 Bank and the obligations of the Guarantor under this Guaranty. For the purposes
 of this Guaranty,  Liabilities  include all  obligations of the Borrower to the
 Bank,  notwithstanding  any right or power of the  Borrower  or anyone  else to
 assert any claim or defense as to the  invalidity  or  unenforceability  of any
 such  obligation,  and no such  claim or  defense  will  affect or  impair  the
 obligations of the Guarantor hereunder.  The obligations of the Guarantor under
 this Guaranty are absolute and  unconditional  irrespective of any circumstance
 whatsoever which might constitute a legal or equitable  discharge or defense of
 the Guarantor.  The Guarantor hereby  acknowledges that there are no conditions
 to the effectiveness of this Guaranty.
 15.  Successors.  This  Guaranty is binding  upon the  Guarantor,  and upon the
 heirs, legal representatives,  successors and assigns of the Guarantor;  and to
 the extent that the  Borrower or the  Guarantor  is either a  partnership  or a
 corporation,  all  references  herein  to the  Borrower  and to the  Guarantor,
 respectively,  are deemed to  include  any  successor  or  successors,  whether
 immediate or remote, to such partnership or corporation.
 16.      Law.  This Guaranty has been delivered in Chicago, Illinois, and will
 be construed in accordance with and  governed by the internal laws of the
 State of Illinois.
 17.      Severability. Wherever possible, each provision of this Guaranty will
 be interpreted in such manner as to be effective and  valid under applicable
 law, but if any provision of this Guaranty is prohibited by or invalid under
 such law, such provision will be  ineffective to the extent of such prohibition
 or invalidity, without invalidating the remainder of such provision or the
 remaining  provisions of this Guaranty.
 18.      Captions. Section captions used in this Guaranty are for convenience
 only, and do not affect the construction of this Guaranty.
 19.      Consent to Jurisdiction. To induce the Bank to accept this Guaranty,
 the Guarantor irrevocably agrees that,  subject to the Bank's sole and absolute
 election, ALL ACTIONS OR PROCEEDINGS IN ANY WAY ARISING OUT OF, FROM OR RELATED
 TO THIS GUARANTY WILL BE LITIGATED IN COURTS HAVING SITUS WITHIN CHICAGO,
 ILLINOIS. THE GUARANTOR HEREBY CONSENTS AND SUBMITS TO THE JURISDICTION OF
 ANY COURT LOCATED WITHIN CHICAGO, ILLINOIS, WAIVES PERSONAL SERVICE OF PROCESS
 UPON THE GUARANTOR, AND AGREES THAT ALL SUCH SERVICE OF PROCESS MAY BE MADE BY
 REGISTERED  MAIL  DIRECTED  TO THE  GUARANTOR  AT  THE  ADDRESS  STATED  ON THE
 SIGNATURE  PAGE HEREOF AND SERVICE SO MADE WILL BE DEEMED TO BE COMPLETED  UPON
 ACTUAL RECEIPT.
 20. Waiver of Jury Trial.  THE GUARANTOR HEREBY EXPRESSLY WAIVES ANY RIGHT TO A
 TRIAL BY JURY IN ANY ACTION OR PROCEEDING TO ENFORCE OR DEFEND ANY RIGHTS UNDER
 THIS  GUARANTY  OR UNDER  ANY  AMENDMENT,  INSTRUMENT,  DOCUMENT  OR  AGREEMENT
 DELIVERED  OR WHICH MAY IN THE  FUTURE BE  DELIVERED  IN  CONNECTION  WITH THIS
 GUARANTY,  AND AGREES THAT ANY SUCH ACTION OR PROCEEDING WILL BE TRIED BEFORE A
 COURT AND NOT BEFORE A JURY.  THE GUARANTOR  AGREES THAT IT WILL NOT ASSERT ANY
 CLAIM  AGAINST  THE BANK ON ANY THEORY OF  LIABILITY,  FOR  SPECIAL,  INDIRECT,
 CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES.

SIGNED AND DELIVERED THIS 18th day of Feb

  /s/ Greg Manning
Greg Manning