If it were me, I'd look around town to see if there is a bike shop or shops that refurbish donated bikes to sell. You know you're getting a bike that's fit for the journey, you're supporting a good cause, you know it's not stolen, and you're paying a lot less for all of it. Definitely better than the pig in a poke you may find on craigslist. (Why yes. I *do* volunteer in just such a place.)