Why did my "Zestimate" drop so much in a week??My home's address: 21491 Vai Avenue, Cupertino, CA, 95014The drop in the last week is completely out of the blue, and 95014/Cupertino continued to rise!Thanks, John Stubblebine, Email: email@example.comCell: 408-655-3434June 14 2013 - Cupertino00YesReport a ProblemProblemSelect oneOffensive contentIrrelevant contentSpam (pure self-promotion)OtherDetailsYour emailPlease enter a valid email address.Submit CancelContent flaggedWe will review this content. Thanks for helping make the site more useful to everyone. To learn more, read Zillow's Good Neighbor Policy.We're sorry. This service is temporarily unavailable. Please come back later and try again.