You will have to see if any will drop the 5% usually asked but most people are desperate to sell so you will have difficulty. You need to allow for all selling costs to be between 12% and 15%. You will also have to pay 21% on any excess capital gains. 3% of the selling price is withheld by the solicitors to cover this. It is repayable if it is less than this or nothing. However, do not expect it back, you will find most solicitors suddenly ignore any requests for payment return. Do you want to pay another solicitor to get the money back? It may cost more than is owed.