aux2
If you really know what you want then I can recommend a good ebay dealer. Send me a pm. But I really would suggest the ad route. You may save yourself maybe a hundred or two $$ going with a grey dealer but at the ad you can try on the watch etc etc. At if you are going to spend thousands on a rolex, the service at the ad is worth the hundred you might save going with the ebay dealer.
I'm assuming now you live close to a decent ad.