My dad was talking to a guy that auctions vehicles to used car lots. He said that he had a 07' F-350 dually diesel that he was auctioning off. He started at like $30,000 and got all the way down to like $18,000 and it still wouldn't sell. Before fuel went up so much, that truck probably would have sold for close to $40,000. It hurts to fill up now-a-days.