EXHIBIT 10.24

        SECURED PROMISSORY NOTE TO MARK MOLDENHAUER DATED MARCH 31, 2001
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                  AMENDED AND RESTATED SECURED PROMISSORY NOTE


$402,000.00                                          Scottsdale, Arizona
                                                     March 31, 2001

         FOR VALUE RECEIVED, AUTOTRADECENTER.COM INC., an Arizona corporation
formerly known as Auto Network USA, Inc. or Auto Network Group, Inc. (the
"Maker"), promises to pay to Mark Moldenhauer ("Holder"), an individual, the sum
of FOUR HUNDRED TWO THOUSAND and no/hundreds DOLLARS ($402,000.00) and to pay
interest on the first day of each month (unless otherwise requested by Holder)
beginning May 1, 2001 on principal accruing from April 1, 2001; and from the
date hereof on the full principal balance, all at the rate of twelve percent
(12%) per annum. All principal and accrued but unpaid interest hereunder shall
be due on April 1, 2002. Payments shall be made to c/o Mark Moldenhauer, 14500
N. Northsight Blvd., Suite 213, Scottsdale, AZ 85260.

         Time is of the essence hereof. In the event of any default in the
payment of any amount due hereunder, the unpaid principal sum of this Promissory
Note and accrued interest remaining unpaid may at any time thereafter, at the
holder's option and without further notice or demand, be declared and become due
and payable forthwith, and Maker shall pay any and all costs, expenses, and
fees, including reasonable attorneys' fees, incurred in collecting or enforcing
payment hereunder. Default interest on the sums due hereunder, including such
attorneys' fees, shall accrue at the rate of eighteen percent (18%) per annum.

         Holder shall have the right, at any time prior to payment of any and
all sums due pursuant to this Note, to convert said amount into shares of
Maker's Common Stock at the lesser of $0.375 per share or the average closing
bid price of Maker's Common Stock for the 30 previous trading days prior to
conversion. Holder shall also have the right to accelerate the outstanding
balance hereof without notice or demand and in the event that either Roger L.
Butterwick or John E. Rowlett ceases to be officers and directors of Maker.

         At no time shall Maker be obligated or required to pay interest on the
principal balance of this Note at a rate which would subject the holder hereof
to either civil or criminal liability as a result of being in excess of the
maximum rate which Maker is permitted by law to contract or agree to pay. If by
the terms of this Note Maker is at any time required or obligated to pay
interest on the principal balance of this Note at a rate in excess of such
maximum rate, the rate of interest under this Note shall be deemed to be reduced
immediately to such maximum rate for so long as (and only for so long as) the
rate hereunder is in excess of such maximum rate, and interest paid hereunder in
excess of such maximum rate shall be applied to and shall be deemed to have been
payment in reduction of the principal balance of this Note or, if the principal
balance shall have been paid, shall be refunded to Maker.

         Maker hereby acknowledges that the loan for which payment is promised
hereby has been made and will be used only for business or commercial purposes
other than agricultural purposes and hereby covenants that the proceeds hereof
will be used only for such


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purposes. Maker hereby also acknowledges that the loan for which payment is
promised hereby has been made, is issued pursuant, and is subject, to the
Arizona Uniform Commercial Code Financing Statement - UCC-1 filed May 26, 2000
with the Secretary of State, State of Arizona, a copy of which is attached to
this Note and incorporated by reference herein.

         This Note may be modified or amended only by an agreement in writing
signed by the party against whom enforcement of such modification or amendment
is sought. Maker (and the undersigned representative of Maker, if this Note is
executed by a representative) represents that Maker has full power, authority,
and legal right to execute and deliver this Note and the debt hereunder
constitutes a valid and binding obligation of Maker. The laws of the State of
Arizona govern the interpretation and enforcement of this Note. This Note amends
and restates in full the Amended and Restated Promissory Note dated March 31,
2000 for $852,000.00 and the Secured Promissory Note dated December 29, 2000 for
$300,000.00 from AutoTradeCenter.com Inc. to Mark Moldenhauer, an individual.

         IN WITNESS WHEREOF, Maker has executed the foregoing Promissory Note as
of the date and year first written above.

AUTOTRADECENTER.COM INC.,
an Arizona corporation



By     /S/ ROGER L. BUTTERWICK
    -----------------------------------------
Roger L. Butterwick, its President


ACCEPTED BY



By  /S/ MARK MOLDENHAUER
   -----------------------------------------
Mark Moldenhauer

                              INDIVIDUAL GUARANTORS

         We, the undersigned, personally guaranty the payment of the aforesaid
note:

Signed in the presence of:                     Individual Guarantors:

/s/ M. H. Feinstein                            /s/ Roger L. Butterwick
--------------------------                     ---------------------------
Witness                                        Roger L. Butterwick

/s/ M. H. Feinstein                            /s/ John E. Rowlett
--------------------------                     ---------------------------
Witness                                        John E. Rowlett