Hello-It is best to have a Realtor provide a market value for your home for you. This will be the most accurate way to determine your homes value. Many of the online sites pull the info that they feel is best but this is often not a true value of the home because they do not have access to the latest or best comps for your home. A market value done by a local Realtor should never be of any cost to you so I would again suggest that as your starting point if you are serious about looking to sell. Best of luck!