ya know -- for fifty bucks, it's tempting to just get one for the heck of it.
Pretty low bandwidth but at least it can pick out fundamentals of a pinball machine's typical clock & control signals.
Currently I just use my antique Tektronix 1631D for about everything when testing this old slow stuff. Logic analyzer with built in O'scope (50MHz). Huge, heavy boat anchor but still works well. Just to have a small scope that weighs less than a trillion pounds might be worth it.