Now a days it's very difficult to trust anyone with your money. Keeping in mind all the scams going on in the script business by the freelance script developers, I think all the involved parties should use some kind of escrow services. Since I am not personally into script business, I don't know about any such escrow.
However, someone trustable from TalkGold members, or the TalkGold owners itself can start an escrow service. They can charge a small flat fee or a percentage fee for this service. This way, after both parties submit their script & money to TalkGold Escrow, the escrow service will make sure that both parties are totally satisfied about how the script looks & the amount of money held in escrow. After ensuring satisfaction, the escrow will distribute the script & money to the proper hands.
Just my 2 cents. Good luck.