Audiogon seller's question

It has been a long time since I've sold something on Agon. I still buy quite often here, but usually sell on US Audiomart. That said, I have recently listed a relatively expensive pair of speakers and just received an offer through Agon. The buyer just joined and of course has no feedback. So it will for sure have to be Paypal, but no F&F. What is Audiogons role in protecting either the seller or the buyer these days? I would like to have a phone conversation for such a transaction, but I know that's not going to be allowed.