I agree with Anna,
Your best bet is to get a Realtor to sign you up for automatic email alerts for foreclosures, short-sales, bank-Owned etc. Once they send you an initial list to look at, you should receive the additional ones via email when they hit the MLS. Obviously there are some that don't go on the MLS, but most major banks are having agents deal with the listings. The ones you find on some of the 'paid' sites, are sometimes not for sale yet, or may never be for sale. Many have just had liens put on their property, doesn't mean it is in foreclosure, which is mis-leading. You may hear the term Lis pendens, which means a lawsuit is pending, could be foreclosure, but could be also a claim of ownership or title dispute.
Good Luck, contact a Realtor in your area and ask if they provide this service.
Independent Brokers Realty