Let me say I am probably one of the few guys that bought the same watch at the same time from two different dealers to see if there was really any difference. Paul was one dealer because his price was so much less than any other dealer. I then picked out another regular dealer that I had done significant business with. The Explorer II's arrived about the same time. I was at first biased thinking that the more expensive watch must be of better quality. I paid significantly more - it must be better. After a few hours of close inspection I could see no difference between the two watches! Now, one year later both are still running like exact twins.
Now I am sure this is not true for every watch in a dealers collection. There are bound to be variables.
That said, I just received two GMT II's from Paul. I am again happy with my purchases. For me it was good price, good service, good product. Your actual results may vary, and in my experience, this is true for any dealer.