Once before I sold a Tag McLaren AV amp that a neighbour of mine who operates a business in repairing hi-fi had fixed and checked over before I sold it. The buyer was in France which wasn't a problem, I sent him the postage quote and he paid. Sent the amp off and then he claimed it wouldn't work, so I gave him the option of sending it directly back to me, or to my neighbour who could fix it and return it to him. He just wanted a refund and so a return label was sent and I got it back. I asked my neighbour if he could have a look at it when I got it back so I could re-sell it ASAP, and I explained the situation and where the buyer was, he then asked "that wouldn't happen to be "Mr Frenchie would it?", and it was. It turned out he was sending my neighbour an identical amp with the same fault - a blatant eBay scammer. Anyway I got the same amp back which was working just fine. My neighbour just added the fees I lost out on to this guys bill and gave me the cash!