Really? Well, that I'm not so sure, because I've seen watches ranging from absolute garbage to excellent replica; it's all hit or miss. Few years ago, I went there and saw what would be considered a high-end omega speedmaster replica; the only obvious flaw (visually) is with the subdials being too far apart from each other.
I have the feeling that these dealers are charging a lot more (at least 2x) by selling online to overseas customers; that's why I'd prefer to wait a bit longer and go buy watches directly in either HK or Guangzhou. It's safer when you can physically inspect the watch.
By the way, are you from HK?
I haven't been back for a few years already; don't know how the scene is like nowadays.