Buying these kinds of properties is risky, but not impossible.
1. Check out online sites such as Holk Van Homes
2. Go to your local courthouse and ask when the next sheriff sale is.
3. Google "Lancaster Foreclosure" and see what comes up.
You don't need to be an insider to figure this out, but there is risk involved. Sometimes, you are buying trouble. At a sheriff sale you're probably buying something you've never seen the inside of and you may be buying old debts/liens too. You need to do your homework before you bid.