I can almost guarantee that Popastuey is a scammer and all his watches are replicas. I don't know about this Balmon guy though. His feedback is pretty good and he buys a lot of stuff from a lot of different sellers. He seemed genuinely interested in my opinion of the timewalker.
First thing most people say when they see a nice watch on someone who's wearing a pair of jeans is "it's fake" so people hear that a lot. I've had people tell me genuine Rolex's were fake 'cause all Rolex's have "glareproofed sapphire" crystals, not "plastic" or "there's no serial number on the back like there should be" so he's heard that too. But when you point out 10 or 12 subtle inconsistencies, and 3 glaring errors, and then back it up with pictures, they take you a little more seriously.