Sold something collectible - but not hugely valuable - to a US buyer. I had all over the listing in underlined caps - message me first if international or be aware that sending not by airmail this may take 5-7 weeks. She bought. I messaged her to say I can send it airmail and charge you cost, if you'd prefer it or be aware it takes 5 -7 weeks (or more) if I send it not airmail. She said That's OK, fine. Send it the cheaper way.
I posted it. Got proof of postage. Within a day or two she was asking "Is it here, yet?"
No.
A day or two later:
"Why isn't it here yet?"
Polite, friendly but impersonal response to the effect - well check back at our messages. I warned you it will take weeks and you agreed.
Almost daily messages for a couple more weeks. She opened a dispute and claimed never to have got it. Despite having proof of postage I just thought "I can't deal with this bitch any more" so just refunded her instantly. So she got the item (presumably because I bet it did arrive) and a refund (Scammer). I instantly regretted not fighting my corner as I did have proof of postage but truly decided for a low value item not worth it. Wished I had in retrospect as it rankles years later. She got quite abusive but I stayed pleasantly calm throughout (whilst thinking WHAT A BITCH) in case I had to prove it later.
I'd been on eBay since it started and had and still have 100% rep (apart from the bitch who pressed 'neutral' then gave me blindingly positive feedback - when I questioned her she said "The neighbour's cockerel is waking me up every day and I'm so tired I hit the wrong button!" I kid you not. Yes, nutjobs in the UK too...) I thought it was mutually assured destruction if I gave her negative feedback (American Scammer, not British Cockerel Nutter). And I didn't want to risk my 100% good feedback for umpteen years on one con artist.
I realised after the US woman was probably a scammer. I'm sorry for blaming an entire several continents for the dickishness of a single resident but - ah tough. I'm doing it.
I have never sold anything outside the UK/Ireland ever again. Never had a problem again. I sell a fair bit. One problem arose recently but I refunded him (gobby bloke) instantly and he left me stellar feedback.
Incidentally, the American woman had 100% good rep - so I no longer take that as a guide to how trustworthy anyone is. I also am not put off buying people with 97% , 98% or 99% rep as the more transactions you do the more inevitable you will get the odd headtheball.