Personal experiences of friends and family are always worth taking notice of when finding a conveyancer or conveyancing solicitor, but your estate agent will also probably be able to suggest a firm that they trust and can recommend. The agent may well get a referral fee if they find solicitors for you, but don't let that put you off: remember that it is in the agent's best interest as well as yours for the sale to proceed quickly and smoothly, so they are only likely to recommend an efficient law firm.