I think what PO needs is a trusted 3rd party trade intermediary. Both parties send their funds via the appropriate venues, and the trusted 3rd party sends them back out.
The 3rd party should make a little bit for his or her time as well...say 2-5% off each side of the trade.
I would be willing to do something like this, but I don't think I'm a very good choice as I have no trade history on PO and am not online enough to service trades. Although I am 100% trustworthy, I can't really prove that. Someone who frequently trades (with 100% satisfaction) and is online the majority of the time should be this 3rd party intermediary for trades.
Just a thought...and an opportunity for someone to make a little change on the side.