Promissory Note - PurchasePro.com Inc. and Charles E. Johnson Jr.


                                 PROMISSORY NOTE
                                        
PRINCIPAL AMOUNT:  $550,000.00
MAKER:  PurchasePro.com, Inc.
DATE:  September 2, 1999


1.   FOR VALUE RECEIVED, PURCHASEPRO.COM, INC. (the 'Borrower'), hereby promises
     to pay to the order of CHARLES E. JOHNSON, JR. (the 'Lender'), the sum of
     Five Hundred Fifty Thousand Dollars ($550,000.00), or so much thereof as
     may be outstanding under this Note.  The outstanding principal amount of
     this Note shall bear interest from the date of any advance(s) of principal
     at the rate of ten percent (10%) per annum.  Interest shall be calculated
     on the actual number of days elapsed on the basis of an assumed year of 365
     days.  All accrued interest and principal shall be due and payable on March
     31, 2000.

2.   Borrower may prepay the Note in full or in part at any time without a
     prepayment penalty.

3.   All rights and remedies of Lender under this Note and under any applicable
     law or at equity, are and shall be cumulative to the greatest extent
     permitted by law.  Any delay or failure of Lender or the holder hereof to
     insist upon strict performance of any of the terms of this Note, or to
     exercise any  rights herein conferred shall not be construed as a waiver or
     relinquishment to any extent of Lender's or the holder's right to assert or
     rely upon such terms or rights at any subsequent time or in any other
     instance.

4.   Borrower shall pay to the Lender or the holder hereof all costs and
     expenses incurred by Lender or the holder hereof in connection with the
     collection or attempted collection of the sums due hereunder including,
     without limitation, reasonable attorneys' fees.

5.   This Note may not be modified, altered or amended except by an agreement in
     writing duly signed and acknowledged by Lender.

6.   This Note shall bind the successors and assigns of Borrower and shall inure
     to the benefit of Lender and his successors and assigns.  Borrower shall
     not assign or allow the assumption of its rights and obligations hereunder
     without Lender's prior written consent.

7.   This Note shall be construed in accordance with and governed by the laws of
     the state of Nevada.


PURCHASEPRO.COM, INC.



By: /s/ Christopher P. Carton
    ------------------------------------- 
    Christopher P. Carton,
    President and Chief Operating Officer