Crab for $3.99/lb at Manila Oriental Market in SF
Just like the title says: we just picked up some live crab for $3.99 a pound at the newly opened Manila Market, off Mission above highway 280. They've got an amazing fish selection, too -- live carp, trout, tilapia, etc., plus lots of butchered fish. They have a number of fish cleaning and frying services.
It's at 4175 Mission St.