One useful tool is azcentral.com/realestate
this will let you search by zip codes, property values, or some combination
My feeling (I've just bought something, although not in your price range) is that higher end homes in desirable areas like PV or Scottsdale aren't as affected to the same degree as the entry homes for first time buyers on the fringe of the valley (Sun City, Anthem, etc). The internet site listed above should have some articles about Phoenix real estate....