You and many others have fallen into this trap created by RealtyTrac "listings" on Trulia. As I have said many times before in this forum, RealtyTrac information is at best confusing and at worst downright wrong.
The information you see is not the "sales price" of the home but either the default amount (in other words the missed payments) or the loan amount of the loan that is in default. When you see $30,000 "prices" you are looking at defaults on a 2nd or 3rd TD, and if they are in default then you can bet the 1st TD on that home is also in default. To complicate matters, the home may not even be listed for sale. Many home owners work right up until the foreclosure sale to save their homes and never even think to try and sell it.
Your best bet, if you are serious about buying a home, is to work with a REALTOR who is experienced with 1st time homebuyers who are at the lower end of the income scale. They will be able to refer you to lenders who also specialize in this market and will know about city, county, state and federal programs that might be of benefit to you. Let me know if I can be of further assistance. Dare to Dream.
Real Estate Consultant
RE/MAX Palos Verdes Realty