You can search county records for foreclsoures, but to buy at auction you should be a cash buyer and buy with no contingincies, that means no mortgage or inspection. The best deals for most buyers are after the bank buys it back at auction and clears the title, cleans the house and readies it for sale. Your best bet is to hire a buyer broker who can assist you with finding a foreclsoure you can usually do so at no cost to you, they get paid their commission from the fee advertsised in MLS by the listing agent and paid at closing.
This way they can get the information for you and you will have someone assisting you through each step of the buying process.
Now if you want tio work alone, your best bet is contact the leading listing agents of bank owned homes in your area, the listings are assigned a good month before they hit the public, the agent has to wait for it to be cleaned , appraised and get clean title, in teh mean time you can look at these house, inspect them and get your offer together for when they do get priced you are first in line.
please see my blog for a complete list of tips and advice for buying bank owne dhomes