There are three steps that have to take place before a property can be sold as a foreclosure. Here's a quick diagram explaining the process of actually getting to the status of an actual foreclosure and being sold to the Bank or a 3rd Party transferring via a Trustee's Deed:
I would just caution you if the property listings are from RealtyTrac, which is a company who advertises "foreclosure listings" on Trulia. RealtyTrac's primary objective is to separate you from your $$$ in exchange for providing information most any RealtorÂ® can provide you for FREE.
As far as having the most up to date listing information for ACTIVE listings team with a local RealtorÂ® who can set you up with an automated search for what you can afford.
BEFORE you start seeing property, obtain a "True Pre-Approval" (your most important step in my opinion).
You MAY need to improve your credit score, increase cash reserves, etc. before buying; however, at least you will have a roadmap to eventually purchasing if this is the case. Furthermore, this step can save you from wasting money on a purchase that does not close escrow!
"Retail Banks vs. Mortgage Broker/Bankers"