Weekly Real Estate Tip: You don't want to create the wrong impression by pricing your house high and then reducing it. Nor do you want to leave money on the table. An agent can analyze comparable sales and prepare an estimate of value—often called a CMA—for comparative market analysis. It is OK to compare these online estimation tools but note the variances your agent will point out because your listing agent should have the experience and education to provide you with a more accurate opinion of value.