trusting a person is nowdays bexame very risky i was thinking about something different lets make programms to handle escrow servic like in localbitcoin we can trust machines more than any humans right . like a atm . machine cannot run with your money . he will complete the servic without any greed no matter how much amount will be it will do its servic till people give the escrow fees. it will be like a slot machine you can play it when you really put a coin in it . we can set a small fees like 0.02% from the dealing or any fixed amount and to avoid sql injections i told this here so some professonal programmers can build it insted i do