Bidpay?
There is no 'buyer protection' included in Bidpay, but since you have to pay for the money order with a credit card, you can dispute the charge with Visa/Mastercard/whoever if there is a problem. (Paypal supposedly includes buyer protection, but a number of people have had unsatisfactory results from it.)
I've heard more bad complaints about bidpay than good ones. I feel safer with stuff I can track easier that I've paid, and who I've paid. Money orders tend to make me jittery, as unless I want to pay a fee to find out who cashed it... it's more trouble than it's worth in my mind. The only thing I can claim against is mail fraud if I mail a MO to someone than paying them with a CC and being able to dispute it.

