How do you tell which home sales were by the owner, versus by a real estate agent?I'm asking the question because I was wondering if I could detect a statistical bias in the sales prices of single-family homes, depending on whether the homes were sold by the owner or by a professional real estate agent. Thanks.January 11 2013 - Telegraph Hill00YesReport 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.