i would suggest finding whatever catches your eye, but in the free to really cheap garage sale price range. if you have a nak for tinkering with a bike, "rebuild" it, tune it and you can grow attached to it. if you need a ready to go old bike, good luck & be careful. i can't imagine what the price range for a new old bike is, but maybe $100-300 depending on your budget and sanity. i don't think that i could make a good judgement on the price though, so ask around for some garage beaters your friends are ignoring...