My old bike needs something called a hub overhaul and unfortunately, the person in the bike store says that it's too dangerous to ride on it. Also, the bike itself would only be worth probably $20-30 now and I should be getting a tune up as well which totals to $170. The thing is, it's an old bike and it's very heavy and all that. So I guess I definitely need a new bike. But my question is, is it okay if I spend lesser money $400-500? Since I pretty much do all my commuting in a single bike (riding long distances) I need a good bike which makes it a bit easier and not making me completely exhausted by the end of the day.