There should be no "QC extra fee" simply because this is one of the easiest paint job I've ever seen. I'd agree with you if this had some kind of intricate paint job, say, I wouldn't mind paying 50$ extra for the next Red Sonja PF if this guarantees I get the skin tones painted properly. In a statue made by literally three colors (white, grey, black), I don't see the point.
Even then, I would be super suspicious... I mean, the P2 Maquette is supposed to be so expensive due to the intricate paint job - and we're discovering now that they're using decals on a good chunk of the body and on the head sculpt.
That is quite the compliment saying it looks like an easy paint job. I don't think the photos do the piece justice.