New HISTORY series premiering Sunday, Nov. 27 reveals risky business for collectors hoping to cash in » 1123b

Las Vegas dealer Glen Parshall (left) considers making a cash offer on a fossilized woolly mammoth tooth brought in during the taping of 'Real Deal,' HISTORY Channel's new auction house reality show based at Don Presley Auctions in Orange, Calif. Image courtesy of HISTORY.

Las Vegas dealer Glen Parshall (left) considers making a cash offer on a fossilized woolly mammoth tooth brought in during the taping of ‘Real Deal,’ HISTORY Channel’s new auction house reality show based at Don Presley Auctions in Orange, Calif. Image courtesy of HISTORY.