Why are there two Zestimates for this location ? One at $527.0 and another at $271.0 ? Question refers to 1000 Swallow Ave UNIT 5, Marco Island, FL 34145March 19 200900YesReport 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.