I almost got ripped off by Carmax of Plano. They offered me 6500 for my 2005 Toyota Tacoma PreRunner SR5. Told me that they could only get that if they bought or sold it. Well I found on the Carmax site a 2005 strip model PreRunner for 12, 998. I complained to the corporate office in Virgina, and when I went back to the site the car had been removed? Well I kept a copy of the site knowing they may do that. I wouldn't buy a thing from these people. It looks like they are corrupt all the way to the top.
Detailed at http://dallas.craigslist.org/dal/cto/1113474229.html
The complaint has been investigated and resolved to the customer’s satisfaction.
I highly doubt the vehicle you found on the site disappeared just because you found a pricing "discrepancy" - the vehicles actually disappear the next day if someone has sold them. Carmax uses an automated inventory system that only displays vehicles available for sale, and the vehicle is deleted if purchased.