My current scope ... for the past 25 years ... is a Heathkit IO-4235, the last scope that Heathkit really designed themselves and offered in kit form (there were some later scopes, made by other firms and private labeled). The 4235 is dual trace, delayed sweep, 35MHz. It's in new condition, but it has sat in storage, in a box, for years at a time, at least 3 times. And on two occasions I've really had to tear into it to make some major repairs (shorted tantalum caps blow the power supply .... and they blow it violently, with smoke, fire and loud acoustics), but it's in new condition right now. About 4 months ago, the pilot light (an incandescent 24 volt bulb) blew out. While I was in there to replace the light bulb, I noticed a 3500 uF 35 volt capacitor in the power supply totally blown apart. Mind you, the scope was working, and I am quite sure that the capacitor had been that way for years. The trace does seem "smoother" since I replaced that. If anyone is looking for a good scope on E-Bay, the Heathkit IO-4510 was a very good basic, triggered sweep dual trace scope (although only 15MHz), and can be found cheaply on E-Bay (it will probably cost you more to ship than you will pay for it). It's actual construction is in some ways better than that of the 4235.