Hi everyone! I'm helping my friend bike shop, and I thought you guys might be able to help. She's looking for a cheep ($100-200 range) used bike to ride around san francisco with, (so lots of hills). Ideally, she'd like it to be a hybrid so that she can take a stab at some trail riding as well. We've been checking craigslist, but is there anything specific we should be looking for? Like certain brands or parts? Thanks for your help!