I don't know about this one
I assume you bought the 897 ebay listing that's been up for a little while?
Seller is greek. Wouldn't be suprised if the steelbook was sold elsewhere too
PC steelbooks are far less documented than other VG steelbooks
Could be 1000 sold in this numbered fashion in Greece or wherever the seller got it from and another 7000 sold elsewhere
Not sure how collectible it is though as PC steelbooks so rarely go for big bucks