you could get a pake rum runner. I have one as my ugly beater bike. its the one i dont mind leaving outside in a city or for hours in Boston or anything like that. It is a pretty plain frame. nothing special about it at all. But it has great ride quality. a lot more quality than people give it credit for. and the frameset can be had for $200ish. you could make a fun ride with it and not be too worried about it being stolen