It's very difficult. As Cindi noted, most banks (in fact, I don't know of any that don't) list their properties with Realtors. So you're going to be dealing with a Realtor at some point.
You could pay a bit more and buy from an investor. Investors are active in this market, and some are buying REOs. Many investors would be glad to flip a property to you for a wholesaler's fee--often in the range of $5,000-$20,000. They've done all the work. Now you'd just buy it from them. And investors would prefer to sell directly to you, so they wouldn't incur the commission.
Hope that helps.