http://www.homepath.com/
this is fannie mae reo listings. already foreclosed and for sale by fannie mae. To get the best deal you have to understand how this game works. For the first 2 weeks the listing is for sale to people who intent to occupy the property (this crap is government backed, so anti investor...). So basically if you make an offer and say i am going to make it my primary residence and your offer is in within first 2 week they might take your offer without looking at investor offers. Meaning listed for 100k you offer 100k you get it, while there might be an investor offers for 115, 125, $150k. Now, if there is no offer from primaries for the first 14days on the 15th day if i remember correctly they open the investor offers and pick out of that.
this works well if you want to buy 1 property, if you want to buy many you will have to compete for juice with other investors.
Good luck,
hope this helps.