Some are sold with Salvage title some are sold with no manufaterer statement of origin (MSO)and can never be registered.
Here's a link to the cars
http://www.barrett-jackson.com/application/onlinesubmission/search.aspx?st=1&aid=283&d=01/14/2009 If the link dies just go to
http://www.barrett-jackson.com/ click on scottsdale then current car list.
Then you can drool over all the cars GM is dumping.
Ford already is selling the Raptor concept.