How do I choose an estate agent?

Your choice of an estate agent can make a big difference to the price your property sells for. Research in other countries shows that a good estate agent can add 5% or more to the selling price. On the flip side, a poor estate agent can be a nightmare, causing untold stress. It is not unusual for asking prices to be reduced by 5%, 10% or more before they can find a buyer. So how can you pick the right one?