The Oakland Laney College or Coliseum flea markets, and the Ashby BART flea market in Berkeley, are all well known for stolen bike sales, including ones from SF. Bike thieves aren't particularly smart or resourceful, so even though it seems dumb many stolen bikes are still resold locally.
Some more info is available online here:
www.BikeEastBay.org/theft.
Good luck, and please report back with info if you do recover your bike!