I have seen many of those cases. The seller put up a really low list price and wait for multiple offer. In most cases, it is REO and bank wants it off-hand ASAP without any repair. The final price is always higher than the list price.
One example: a house in Plano listed 60k with market value at 170k+ in 2010. It needed $40k reapir in my estimation. It was sold at 71k.