Although I haven't purchased from him, Asia7750 is a TD here and on several other forums. I read any serious negative reviews, so I think you should be ok.
With respect to the PAM005, be sure to confirm the manufacturer and version before purchasing. The PAM005 from N-Factory (Noob) with all of the latest updates (V3) is in very high demand is no one seems to have it in stock at the moment. Some dealers have the V2 version, which they are accurately selling as Noob or N-Factory, but they don't mention the version. Other retailers are selling H-Factory 005's, which are also pretty decent (and less expensive), but not as close to gen and H-Factory cuts some corners with replicating details that I am not keen on. Unless the price is exceptional or you aren't a stickler for details, you may want to wait on a PAM005 until you are certain you are getting freshly minted N-Factory version.
Btw, If you can give up the manual wind mechanism, PureTime has a pre-order now on the latest version of the PAM292 that is really a really a stunner! Here's the link:
http://www.puretime.co/blog/281/ It comes with the stainless bracelet, but you can buy a high quality leather or rubber strap (which you would probably want to do anyway--since the leather straps that are usually included aren't close to gen quality).