I have not. But here's what the clues tell me. Curious if others share my paranoia.
Fairly new. Brags about "18K" and "top quality." Self-identifies as a wholesaler. All (minor) red flags to me.
Worse: they follow no one (!) so there is another account somewhere and they are endeavoring to keep their contacts and associates out of view -- and potentially out of harm's way.
Isn't this a vendor who does not take returns because their stock is all remote and once they bring it into the country its a final sale? Or am I missrecognizing them?
I have never bought from them, but I believe that at least part of their modus operandi is to take other vendors' photos and videos and advertise those pieces for sale. Iirc I've seen a vendor (can't remember which one unfortunately) complain about this before.