I recommend that you contact a reputable title company. The title company will handle the entire transaction from providing a purchase contract, prepartation of all legal documents, title insurance policy, title search, pro-ration of taxes,escrow , recording of the deed etc. They will also make sure that everything is done to meet the requirements of the buyer's lender.
If the buyer is going through a lender you might want to ask that lender if they have a title company that they routinely work with or would recommend.
Good Luck and Congratulations on your sale,
Cutler Real Estate