Most buyers have already done some online research before you meet them for the first time. They will likely have visited sites such as Trulia and Zillow and will believe that they know as much about property values in your market as you. They might even think they have all they need to make an informed offer on a property. This of course is not the case.
Your resources are more comprehensive, detailed, and more current up to the minute; paired with your personal knowledge in regards to local properties helps you give your buyers an edge. buyers frequently have unrealistic assumptions about what they will need to pay for a property in competitive situations. Use your resources to provide a more realistic picture of what they can expect, fine tuned to what they would actually consider. That done you can show which of the available properties match their ideal home.