Well he replied to my message claiming that he really thought it wasn't a KO, believing KOs had different colours. Which is technically correct - a KO is generally obviously different, while a counterfeit (which we call KO for convenience) is a replica that is very difficult to tell the difference. This guy had a counterfeit replica, that he claims he bought 2 years ago.
Anyway, he has pulled the listing. So, yay to us - and the fight against counterfeits continues...