Public Information & CompsHello,I have a question in regards to the following:1. How come some listings show the entire pricing history where others do not?2. How does Zillow determine comps?I am asking these questions because there are 2 listings in the same building complex (different addresses) that are almost identical listings, but the zestimates are vastly different & the original purchase price of one of them is not showing & the other is. The 2 units I am comparing are: 301 Main St. #20F & 338 Spear St. #21F. 20F does not show the original sales price & 21F does. Also, the zestimate for 20F is higher even though the units are nearly identical. Why would the comps be different for each? Is there any way to make adjustments?Thank-youMarch 09 2013 - South Beach00YesReport 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.