I nominate this "beauty" as being the most overpriced:
http://www.ebay.com/itm/1957-Topps-M...item2a4b9f5cc2
Esepcially when this is listed as a buy it now at 1/5th the price (and is still WAY overpriced itself):
http://www.ebay.com/itm/1957-Topps-U...item3ceb519abd
Cheers,
Patrick