I don't think there is, people just do trades through PP if it's a really TRUSTED member. I think it's the best for the seller.. & I'm sure i would do the same.
I only use PP and LR, but i make them write a note CONFIRMING they have recieved items, and if they dispute, i call paypal up and let them know about it.
:3
Note should go: I am paying for virtual items i have already recieved and WILL not chargeback under no circumstances.