Yes, that is Bjorn the Fell-Handed, complete with an oversized Wolf Claw centre front.
Yes, those are PLASTIC Tartaros Terminators and MKII (or is it MKIII?) Space Marines too.
And as we already know, there is a plastic Thousand Sons Sorcerer, which may or may not be Ahriman.
It's a big box of Space Marines at a reduced price.
So it's going to fly off the shelves!
Unlikely other plastic character models which become cheap and readily available on eBay, I expect Bjorn to be as rare and expensive as Krom Dragongaze was.
So if you want him, make sure you get him quick!