As someone who has lived in Beijing, I guarantee that it's impossible to do this well in person. Only once in my life, in Kowloon, Hong Kong, did I have an actual in-person contact who was reliable and had access to the highest quality watches. I agree that it's fun to go to both some of the well-know markets as well as some that just kind of pop up and look at whatever you can find, but the chances of what you're finding being as good as what you'll get from a TD here is very, very slim. Plus, you have to negotiate on your own. Chances are, you're going to end up paying twice what you would from a mass non-TD rep site for the same low-end product. The same holds true, by the way, for clothes and shoes, wallets, etc. Use a TD.