This is a link to an auction for a 1990 Mercedes Benz C-11 designed by Sauber and driven by Michael Schumacher in the Le Mans. Looks like it's part of a bankruptcy liquidation.
http://www.bid4assets.com/auction/index.cfm?auctionid=228109
http://www.bid4assets.com/auction/index.cfm?auctionid=228109