Not sure I believe it (it seems unlikely that someone would be able to sell a watch every time tourists get off a bus; that seems like a one-off at best). But it's interesting and poses a real ethical question. It's surely a scam, but one that's in a gray area. If you don't actually say something is real, the buyer is responsible for any assumptions he makes. I also wonder about the whole issue of value when it comes to real vs fake. If a fake is good enough to be mistaken for the real thing, we're really talking about a mental construct. It's not like buying food when you're hungry and you can't eat it if it turns out to be plastic. A brand name, collectible, or anything like that is kind of a weird totem that only has value because people say it does. Anyway, interesting questions that you can interpret in many ways.