Are we talking about
this guy?
Have been keeping an eye on these dodgy "steelbooks" and it's sad to see how much they are selling for and how many unsuspecting people are buying these.

I already know what the answer is and have messaged him and called him out on it as well as reported all of his listings. He has sent me message with an image of an original steelbook open with the steelbook branding and has assured me that it is genuine. Obviously it's not and I have no intention of purchasing from him and am just wasting his time. I have requested a photo of said steelbook next to today's newspaper. Let's see if he's willing to play.

Without any prompt from me he's already offered to drop the price to €90.

This is a photo that he has sent me which should be enough to "Verify" that what he is selling is genuine, so if people are buying steelbooks online, be forever vigilant.
This is the listing that I've been querying.
The fact that all of his listings state "Without Guarantee & Return !!! PRIVATE SALE" should also throw red flags.