It's almost certainly just eBay & its bots being arseholes.
I had a problem selling my 2nd hand Les Paul style Guitar, even using the same wording as the advert I used when I bought it off eBay about a year earlier, and it wasn't a licensed dealer. But once the bot has flagged you anything using similar keywords will equally re-flag to them.
I read they even had a very rare vintage Stradivarius destroyed, by court order, because of an imagined "copywrite infringement". The seller rightly sued and won millions in compensation.
They will eventually kill their Golden Goose if they carry on like this, and just become an extension of Alibaba.

561, HD621, DSP5000s(24/96), DSP33C, DSP33 surrounds, Pioneer DV575A CD/SACD/DVD-A, Panasonic DB170
(561 to be replaced with G68 shortly.)