Good looking out, only thing you can so is look at the sellers feedback left or received and send a message to the buyer letting them know the deal was no good. Here is a Mantle rc for sale that is also bogus:
http://cgi.ebay.com/1952-TOPPS-MICKE...#ht_499wt_1154
The seller has been reported but it takes more than one to put a end to a listing.