A Comparative Market Analysis (CMA) is a document, drawn from a local Multiple Listings Service (MLS) database, that presents pricing information, property details and photos of homes similar to yours (termed “comparables”) that recently sold, failed to sell, or are currently on the market in your area.
A REALTOR® will typically provide you with a CMA as part of a listing presentation he or she delivers at your home in hopes of being able to exclusively represent your interests when you sell. This CMA will include the price or price range that the REALTOR® thinks you should list; although the REALTOR® might adjust that figure on the spot if it’s the first time he or she has been in your home and had the chance to examine its layout, quality, workmanship, condition, and so on. (It’s also worth noting that REALTORS®, knowing that you don’t plan to list any time soon, are also usually happy to provide you with a Free Market Evaluation or “mini-CMA” of your home).
Generally, studying what has worked in your area – and what hasn’t– will help you to strategically price, position and stage your property so that it sells for top dollar in a reasonable time frame, with the least inconvenience for you.
http://www.realtor.com/realestateseries/downloads/BuyerAssistTools/home_sellers_guide.pdf