In order to stop the repossession, you may need to sell your house quickly to raise the cash necessary to repay your lender before the repossession has taken place. Realistically you cannot go to estate agents as it would take way too long and too late to stop the repossession.

You need a very reliable cash buyer who can buy your house extremely quickly. A good cash buyer would be in position to buy your house without any delays as he or she would have all the finances ready before contacting you. He or she would buy your house most likely for investment and would therefore not be a in chain. This is very important: you don't want to be waiting because of somebody else in the chain while you are trying to avoid repossession.