Shoot me an email directly if you'd like to talk to me some more. I don't look back on this same Trulia thread for answers posted after mine.
Realtor Since 1996
Main Street Realtors
Sometimes these are fake ads trying to get the first months rent and the deposit. Then they disappear.
Sometimes these are homes going into foreclosure.
I would suggest you use a realtor to help you find a nice home. If they are good, they will help answer these questions for you.