In my experience well cleaned or bare figures will sell for more…the figures you’re talking about will sell for good money either way…but it may be worth your time to properly strip them if you want to maximize your $.
They vary a bit from time to time, the best way to judge it is to watch several Ebay auctions and see what they go for. I don’t think the paintjob makes that much difference but you’d probably get a little more if it is bad and you strip it off.