I would hold out for something else, or check out what either box dog bikes, refried cycles, heavy metal bike shop, or d+d cycles have (all shops in san francisco). If you dont exactly what youre looking at with craigslist, you may be better off going to a shop and establishing a relatinship. at least that way you know the bikes been taken care of and tuned up, and isnt going to turn into an expensive headache.