My five-year-old son has outgrown the little 12" bike he is riding, and before we purchase a new bike, we wanted to ask if anyone in town might have a used one they'd be willing to sell? I think he needs a 16" frame; no training wheels, he can already ride. Fixed gear & coaster brakes would be good. Ideally nothing that looks like a motorcycle or has flames on it or what have you, as he is naturally somewhat heedless of danger; a plain, old-fashioned bike would be great. (We checked Swerve; nothing that little in stock!) Thank you!