Localbitcoin.com is a site with a good reputation you can trust. Ise it myself. There many vendors and they habe screening processes. Escrow is used so if you do not see the money in your banking account you so ply do not release the coins. There is a count down and if you dont release in that count down time the transaction ends and they open up a case against you. Unless they habe not sent you anything and the time runs out then that is fine.