The fourth one is quite nice, my fear is that given the shady appearance of the other guns in question, could you trust you were buying what you thought you were buying. Perhaps I've never heard of 'refreshing markings', but it just makes me question the seller. Also, that seems like a lot of Obies in one place, perhaps he's selling someone's collection?

Also, I did not look at the sellers k98s, but I know many sellers have been doctoring those up in the last few years to jack up the prices on more common k98s and give the appearance of a more desirous, rare and valuable version.