I wouldn't go so far as to call him a scammer, there's no need for such silly unfounded accusations. Let's debate the gun, not the seller.
I don't doubt that the stampings *could* have been stamped at some NVA refurb. There is some precedence for star 1 markings on obviously non-NVA produced weapons. I guess I simply don't have the knowledge to be able to say for certain one way or the other what this beastie actually is. My criticism of the prices is based on the fact that the gun is a Chinese type 56, not an NVA SKS. NVA marks, in my opinion, are not something that greatly improves the collectability of a firearm, they are too rare and too iffy to move the needle into trinity gun range. Sometimes you just have to say "I don't know"; it makes you a more knowledgeable collector in the long run because it forces you to search for an answer and learn...
No idea why the receiver stamps are light. Perhaps the steel is too hard for the type of stamping they are trying to perform at the refurb facility. The fact that it is not in the same spot as a typical NVA star 1 and also not as deep says to me that it was not done in a jig and also not not done with the same specialized equipment that produces the mark on NVA SKSs. Why that is runs the gambit from "It's a different stamp / performed at a different facility / stamped with a different process" to "It was a poorly done stamp done intentionally lightly stateside."