A Realtor can provide you with a CMA, and can counsel you on how the market trends and the economic trends in your area effect the market value of your property.
You can search for a Realtor on HAR.com in the Find a Realtor section. Many of our members have "Client Experience Ratings" and their ratings may be helpful to you. You can also Google the name of any Realtor you are considering to see how active they are in the real estate industry.