At the same time, this also is like the analogy "a solution looking for a problem". Supply exists, but demand does not.
For example, across the Rust Belt in the US, probably someone could buy a house for $10k or an entire block of homes for dirt cheap, but it would be rundown and not very much fun to live in a town with more inconveniences than amenities.
Unless someone is trying to do the homesteading(?) thing, having a free/cheap house somewhere is only a small part of the equation. Maybe I'm wrong, but I would bet even if someone from a city like San Fran, LA, or NY took a deal to live in (e.g.) rural Missouri in a $500 house, they wouldn't be able to last 2-3 years before going stir-crazy.