I don't understand what this means. As in white people aren't allowed to live there? What's the problem with buying these houses?

As a white man living on a very black block in Philadelphia, it's extremely difficult for me to relate or sympathize. People move from here to Pittsburgh because of Pittsburgh's famously low housing costs.

Sucks to suck I guess.

PS: Regarding safety, I went back and looked at street view for all three properties. All three appeared to be surrounded by well-kept yards and houses, cars in decent condition, etc, which is a very good barometer for safety and basic neighborhood quality. These are nice suburban houses.

Just for clarification, I haven't marked off houses because I'm worried about "the ghetto". The third choice has come up in my searches a lot, it just requires quite a lot of work. West View is quite nice nowadays and plenty of areas in Pittsburgh are lively and safe, I'd say there's only a few exceptions.