DETROIT (Reuters) - With bidding stalled on some of the least desirable residences in Detroit's collapsing housing market, even the fast-talking auctioneer was feeling the stress. "Folks, the ground underneath the house goes with it. You do know that, right?" he offered. After selling house after house in the Motor City for less than the $29,000 it costs to buy the average new car, the auctioneer tried a new line: "The lumber in the house is worth more than that!" As Detroit reels from job losses in the U.S. auto industry, the depressed city has emerged as a boomtown in...