I consider the beta of Zillow prices to be about 2-4x that the actual market. When the market was good in 2007, home appraisers priced my house at $160k up from $145k two years ago. Zillow said my house was $185k. Now a home appraiser valued my house at $150k and Zillow says it is $110k.<p>While it may give the newspapers some cash infusion, overall for the end-user, Zillow prices are just plain horrible.