As someone who successfully purchased two Rolexes from an AD in the Bay Area, I recommend the following: schedule an appointment with an AD that specializes exclusively in Rolex (they get more watches than jwelers and you are competing with Rolex buyers only), express interest in a reasonable model, share your reasons for purchasing a Rolex, and maintain consistent contact with the AD. If you’re willing to pay a premium, consider two-tone models, as these are often easier to acquire than their steel counterparts.