The MLS provides true sales information because most offices input the details of the transaction including seller concessions. This information is provided by agents to provide you in realistic expectations for your home in the current market. Sidenote: beware of short sales/foreclosures which abnormally skew the data; they are considered outliers and should be treated as such.

Appraisers use MLS as research, not as a true guide, and verify the sale price on County Records (Assessor and Recorder) against the documents filed.

Any and all info. direct from MLS is the true guide that realtors and appraisers use, any other source is only for research purposes only. http://www.lynn911.com http://www.homes-for-sale-dallas.com

I am not sure where Trulia pulls their sale data from, however could it be that your agent was giving you a net after concessions price? That is the true sale price. For instance, I sold a property for 239k, but it had 4k worth of seller concessions (repairs/ buyer costs), sot the true net would be 235k even though the sale price in the tax record will be 239k. Hope you figure it out! Ask your agent to explain the descrepancy, I am sure they can.

Your agent should be able to tell you which one is correct.