Card Shops in SF?

I'll be in SF for a few days this week and, as a Giants and Will Clark fan, I figured I'd check out a couple of shops. Are there any that are worth my time? I'd be thrilled (pun intended) if I could find any oddball Will Clark items to add to my collection.
Any suggestions?
Any suggestions?
0
Comments
Matt Cain will be doing a signing there Sunday night.
Lefty's Sports Cards
They are near the SF Airport, so probably best to stop on your way to or from the airport if you are flying in.
Peninsula Sports Cards
Located about 30 minutes south of SF. Have been in business since 1975 and carry just about everything. Well worth the trip, Walt, the proprietor is a great guy. Also have two other sister stores located farther down the Peninsula.
Dave's Dugout
Located across the Bay Bridge, also about 30 minutes. Smaller, haven't been there since they moved to their current location. Another long timer.
ajw said he was looking for Will Clark stuff, not exactly vintage.