Valuation of properties is more of a black art than a science. Agents can over value a property just to convince you to give them the instruction, or undervalue it because they have a customer ready to go. We recommend that to protect yourself you obtain two or three valuations of your home before deciding who will market it for you.
Their are a number of independent on-line valuation services that you can use too. These are very effective and many estate agent use these systems to obtain their valuations before coming to see you.
These site also hold data on past sales made in your area. It is important that you know how much you wish to sell your home for before instructing Advanced Property Centres.