Phoenix, AZ is the poster child for this. Homes in the slummiest of neighborhoods are going for top dollar. There has been a ton of artificial demand created by the home flippers and the buy to rent out institutions. Inventory has been rising sharply recently, though, so maybe it is at an inflection point. If any market has a good chance to crash, I would think it would be the Phoenix market.
I have seen lots of $1 stocks with strong earnings and solid balance sheets triple, quadruple and more, but I have yet to see one go below zero.