The guide is simple,check the reputation of a member before using them as an escrow.Reputation just doesn't mean the green feedback's but total forum contribution.If you find some escrow service interesting,make sure you open a thread about them and see if the community suggests you to hire them as an escrow.Personally,avoid third party websites as much as possible.Hire an escrow depending on your trade.An escrow who deals with good wouldn't turn out to be as reliable if the trade goes wrong involving a script.

Avoid users with negative feedbacks like him.