Reasons to choose auction include the speed and certainty that it offers; there is no faster way to sell and success rates through to completion are far higher than through estate agents. Other attractions are that it delivers a legally binding sale with contracts exchanged on the fall of the hammer, so neither party can pull out of the sale or try to renegotiate the price. The competitive bidding process aims to drive the price up so the property achieves its best possible price on the day too.