CERTIFICATION OF THE CHIEF FINANCIAL OFFICER
                       PURSUANT TO 18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the CarMax, Inc. (the "Company") Quarterly Report on Form
10-Q for the quarter ended November 30, 2002 as filed with the Securities and
Exchange Commission on the date hereof (the "Report"), I, Keith D. Browning,
Chief Financial Officer, certify pursuant to 18 U.S.C. Section 1350, as adopted
pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of
my knowledge:

     (1). The Report fully complies with the requirements of Section 13(a) or
          15(d) of the Securities Exchange Act of 1934, as amended; and

     (2). The information contained in the Report fairly presents, in all
          material respects, the financial condition and results of operations
          of the Company.


Date: January 14, 2003          By: /s/ Keith D. Browning
                                        Keith D. Browning
                                        Chief Financial Officer