There's a big difference between a poor neighborhood and a bad neighborhood (bad for whatever reason: crime, drugs, blight, population decline).

Here's a good example how a lot of the $1,000 homes, and the surrounding neighborhoods, really look like: https://youtu.be/IuJFLJ0JApA . In the description there's a link to a follow-up video 3 years later. It's not a pretty picture. But then again, who buys properties on auctions without inspecting them first?