It is frankly laughable that you continue to have the (misplaced) arrogance to see yourself as an arbiter of other people’s business!
If a car doesn’t sell, whether that be due to it being seen as too high a price, or for any other reason, to potentially genuine prospective buyers, is no business of yours. It is the buyers. Your commentary has no place in that equation…except seemingly in your own arrogance.
Whether you have sold four cars (oooh gosh!) via this forum, Z4s or not, is similarly totally irrelevant. I can assure you that however many BMWs you think you have sold and, whether you have misled anyone or not, I have bought and sold a lot more than you.
However, this is irrelevant. The fact remains simple. This is none of your business.
I noted that for a brief time you did indeed make efforts to restrain yourself.
I am disappointed that you have clearly failed in those efforts.