Experienced realtors know the market in a specific area better than any online site can offer. They know how to price your home to ultimately receive competitive offers and on the buying side, they know what provisions to include to ensure your offer gets accepted without overpaying. The data is clear: you will get more for your money when using a realtor.
There is a plethora of real estate data online that can be a lot to digest. Unfortunately not all of it is up to date or is accurate. A real estate professional is in the details of all activity in their area of expertise and can help you not only navigate the mounds of information, but understand how that affects you in the buying or selling process.