In my early days on ebay I sold internationally and found that most Americans who bought from me were picky and prone complaining about more or less anything.  They rarely asked questions or for extra photos before purchase, but as soon as the item (usually vintage glass) arrived the quibbling would start.

A tiny chip, mentioned in description as too small to photograph to the underside of one foot, would be far bigger than they expected.  The colour wasn't as shown on their device.  It seems smaller / bigger than advertised, although I was meticulous about including measurements (and US inches/cms are the same as in the UK).  

It seemed like US buyers always have to find something to complain about and it seemed that they were angling for a partial refund, even if they weren't.  If I said that I accepted returns for refund at their expense, they never  returned the item.

When ebay introduced the MBG, which more or less guaranteed buyers could get a refund for any reason, I was quite happy to stop posting any further than the UK mainly because of American buyers.