Funny that the OP posted this as I have had at least a half dozen buyers back out on US Audiomart. In hundreds of transactions I have never had this happen on AG or Ebay but it seems to be the norm on USAM. I get it, USAM is the outlier in that they don't charge for ads but this is ridiculous. In all cases the buyer made an offer to which I responded and it went downhill from there. Sometimes the buyer disappeared, other times they told me they would make payment, never to send it, after which they either disappeared or informed me they were backing out of the deal. USAM discourages negative feedback unless either the goods or money is exchanged. When I reported them to USAM nothing essential happened, so buyers can act dishonestly with impunity while I am left to wait and try to communicate with the buyer, all the while discouraging other offers while waiting for payments that sometimes do not appear. I will NEVER deal with USAM which is the Wild Wild West of audio sales websites. You get what you pay for I guess.