I won't go through the whole hilarious saga but old timers will remember it but my numptiest buyer ever was the one who returned a cerise tee shirt as I should have known that she wanted a red one to go with her red tartan kilt.
@i-once-was-bump wrote:cerise and teal, two colours never to sell on ebay
Not even black is safe. 
The first neg I ever got happened like this, just for those who weren't around when I ranted about it at the time 
(was a few years ago now, back when I still sold clothing).
Listed a clothing item, title said "Black........", item specifics said "Black", Description started with "A black....". Now, admittedly I wasn't quite as adept at taking or editing pictures back then, and the lighting had giving the (very black) item that kind of UV-purply hue to it around the edges.
So, someone bought it, messaged later to ask for more time to pay, paid, then later left a neg saying "It was black....but I expected it to be purple" (meaning, they read the description, decided I didn't know what I was talking about when I said it was black, decided not to clarify it with me for sure when they asked for more time to pay, and then popped my neg cherry... ). It took me about 24 hours, but I did talk eBay into removing it. 
That buyer had left some interesting FB for other sellers, too - one mentioned that the item looked brand new so they hoped it wasn't stolen (at least it was accompanied by a green dot, though).
