I was gonna say that I'd give the seller the benefit of the doubt based on the high feedback number, but then looked at what else they are selling, and see they have a KO Defensor listed.
And to make it even more suspicious, they have their feedback listings set as 'Private', preventing anyone from seeing what they've sold before (to see if they have a history of selling KOs).

See, if these suspicious things hadn't popped up, I would have suggested that it was just a dealer who themselves got duped, and didn't realise it was a KO. But since that is unlikely, I'd definitely not pay for the auction, and do as ebay says to keep your own profile intact.

This is why I hate counterfeit TFs - so many people, even fans, get fooled so easily, spoiling the fun for real fans who thought they had the real thing.