While I can't help you with SF, in the last year I visited AD's across the country. Most were in the northeast (Boston & NYC). One thing I found to be true [generally speaking] is that you'll get better customer service and discount opportunities in small markets compared to the big cities.
Again, generally speaking. I'm sure there are exceptions. I looked for my GMTIIC for a good six months. I would have bought it from whomever had it in stock, but luckily, none of the big city AD's had one to sell (Boston, NYC, Atlanta, San Diego, San Fran, Chicago). I finally found it in a smaller market in upstate NY...and got a very reasonable discount as well as great service.
Stores like Tourneau & Wempe don't seem to offer any discount on Rolex sports models. It may be because I didn't have a relationship with any of these AD's, but I asked about pricing on a variety of sports models (Sub, LV & SD). All said they do not discount those models. The dealer who sold me my GMTIIC, offered a discount without me asking!
So, try some smaller market stores if you can.