If someone really wanted an escrow service, I bet one of the trusted senior members of this site would be glad to do it, informally, for a small fee.  For example, I would trust Atlas much more than some stranger.  If I wanted to buy something expensive, I would ask him to act as the escrow.  I would send him the Bitcoin payment, and once I confirm that I got the purchased item, he would release the funds, minus a fee, to the seller.