Although sites like these use an IDX feed from local MLS databases, the listing results can often be archived as active, even though they may be sold or under contract. Then, 3rd party companies like RealtyTrac insert data of properties that are in pre-foreclosure, making them appear as active listings, although they're not on the market.
If you're looking for a real-time property search for Edgewood and other parts of the east mountains, go to: http://www.syan.com/search
There is no charge and no sign-up required. You can view all listing details, photos, maps, etc.
Listing results come directly from the local MLS in real-time, so if you don't see the listing here that is seen elsewhere, that means it is off the market (e.g. pending, expired, closed).
If you prefer not to search and would rather have listings based on your preferences automatically emailed to you, then you can setup free listing alerts at http://www.syan.com/alerts
You'll know when a new listing hits the market instantly, before most real estate agents do. You'll also be alerted to status changes, etc.
Syan Real Estate
Call/Text: (505) 730-8181