First of all try to work with a real estate broker that knows how to approach these types of homes, you have to be very careful since foreclosures are usually sold as is and will require contingencies to protect you such as but not limited to inspections. Here are some government links that you might want to visit.
[ ] REAL ESTATE FOR SALE BY THE UNITED STATES DEPARTMENT OF AGRICULTURE (USDA):
http://www.resales.usda.gov/
[ ] Real Estate for Sale by US Government Site #1
http://www.firstgov.gov/shopping/realest…
[ ] Site #2
http://www.homesales.gov/homesales/mainA…
[ ] IRS: Real & Personal Property Sales:
http://www.ustreas.gov/auctions/irs/
[ ] Acquiring a VA guaranteed home foreclosed by states:
http://www.ocwen.com/reo/residential/res…
[ ] Foreclosure requirement by HUD guaranteed loans:
http://www.hudclips.org/sub_nonhud/cgi/n…
[ ] Homes and properties being sold by the different departments in US Government:
http://www.hud.gov/homes/homesforsale.cf…
[ ] USDA Properties for sale all states
http://www.resales.usda.gov/sfhdirect/sf…