My beautiful bike was purchased at a pretty reasonable price from this not-for-profit program.
The space is huge, with the workshop area occupying the large front room and the entire back area devoted to finished bikes offered up to the public at prices ranging from $50 (fixies and old, well worn stuff) to $300 and above (perfect vintage bikes ready to hit the road). Everything in the back room is ready to ride, and also available to test, so take your time.
Trips For Kids functions as an afterschool program and gets some of its funding from people purchasing these finished bikes. Kids from the surrounding neighborhood (Belmont + NoDa mainly) come here and learn how to build bikes from the bottom up, what each part does and its proper name, and some business skills, as their creations are what fund their trips and parties. Volunteering here is a great idea if you love bikes and want to lend some time to an awesome local branch of a super cool program. Cash only.