Why has eBay banned me for life?

Imagine a country where there is no rule of law, where you might be scooped off the street without warning, put before a kangaroo court and sentenced to life in prison without parole and without right of appeal. You have no idea of the charge against you because no one in authority will tell you. You are innocent of any crime, except you don’t know what your crime is; the full might of the law has been brought down on your head and you have nowhere to turn.

What if this imaginary country was not in fact a nation state but a large, wealthy and powerful company? What if it was eBay?

Recently, I was asked by a friend if, in my capacity as a serious amateur photographer, I would look over and value some vintage cameras and lenses that he had inherited. After a little research I quickly ascertained that they were eminently sellable and that the best marketplace for them was eBay.