Wanted: Rolex Submariner Registered in the year 2000 must have boxes and ALL paperwork. I would also want the watch inspected at a local rolex dealer to you.
The Rolex serial numbers run in a certain order (google 'Rolex serial' and you'll have hundreds of references), which help collectors/dealers determine the date of production. If you're after a 2000 Submariner, look for a model with a 'P' prefix to the serial number.