They don't want to dump any of your property which caused goverment lost money. then buy this one at bargin price.
It is common these days some homeowner can't re-fi his house due to property value is under water. But they still can qualify to buy a small one. So they just use this way: Buy a small or cheap one first, then walk away with their underwater one. Thus, they still have their own house. Goverment just want to stop this practice.
Make sense?