Apologies if anybody here is bidding on this (and for flooding Insanity today :P). Sub-20 minutes as I write this - sort of hope somebody here will get if if they're interested.

http://cgi.ebay.com/ws/eBayISAPI.dll...tem=8141071381

Personally, I think it could just be an EEPROM cart that nobody used, and might be well nigh worthless, but then again...maybe it's got something interesting on it. Actually, even an EEPROM cart should be rather hard to find for the C64.