My girlfriend works at CarMax and she told me that they no longer buy vehicles from CarMax. They are still registered as an authorized buyer but haven't bought a car from CarMax in months. Many of the cars bought from the CarMax auctions are in decent shape, but they really jack up the prices compared to other buyers.

She also said that if you can get the last 6 numbers of the VIN she can run a check and see if it was bought from CarMax and possibly pull up the appraisal sheet.