I see a number of 20Mhz-40Mhz oscilloscopes at the hamfests, which go begging. Most are secondary brand, some are not; most work. Seems to me, for not much more spent than for a logic probe, one can get a much MUCH more informative test instrument.
Agreed, I've made several available on the Vintage Computer Forums for what I thought was a reasonable price, but no one was interested. One of those tools you're going to absolutely need one day, when the logic probe won't cut it. Fortunately for vintage computer work, it doesn't need to be fast, but you'll find all sorts of people on the forums telling others they need at least a 100 MHz 'scope with four channels and digital storage. Perhaps that's why people aren't interested in 20 MHz "student" or "TV" 'scopes but will spend money on USB connected devices that claim 100+ MHz bandwidth... Thanks, Jonathan