Help! Our buyers keep pulling out

Q Our house has been on the market for six months. We have seen two sales fall through after accepting offers. In both cases, the estate agent insisted on taking the house off the market after the offer was received, but neither prospective purchaser carried out a survey, then they pulled out several weeks down the line. As a result, our home has been off the market for three of the six months waiting for a sale to proceed. When we accept the next offer, we want to make it conditional on the house staying on the market until the buyer has committed to a survey. Our estate agent is not keen on this approach. How can we improve the chances that an offer will