Why zillow estimate went down so much?Why did zillow market estimates in York and Spring Grove, PA go down Between 10,000 and 20,000? Is there a mistake in formula. That's a lot? What's happening? Please find out why?May 04 2014 - Spring Grove00YesReport 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.