Help Me Understand How this works?Example: 41 Blenheim Ct Arden NC 28704. Yesterday it read a zestimate over $540k (i think $546). Today it reads $509k and says a $1,000 variation in the past 30 days. This house sold on the 14th Dec at $525,000. No other house in the neighborhood or even that section of the neighborhood saw that type of dive. How do you explain that?Please email the response to email@example.com.January 14 2011 - Arden00YesReport 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.