In a very similar situation, I posted a pair of "Waxed Flesh" boots on eBay from my 13 year (albeit rarely used) account. They had plenty of pictures, waxed flesh is a very well known term with regards to boot leathers, but within 2 minutes, my long term eBay account was permanently terminated with no chance for recourse.

Besides it being exceedingly difficult to find someone to talk to about this, when I finally did in the chat service they offer, as soon as I brought up my account they terminated the chat with some copy/paste message about how they cannot talk to me about it as it might compromise their fraud detection. People I've talked to have mentioned that it might be due to the fact that there was "Flesh" in the title, but that is a valid description of the good I was trying to sell.

I guess what I'm trying to say, is that it felt entirely arbitrary, I had no recourse with regards to the discussion, and eBay is similarly shitty with regards to service.