Just remembered another one that lurks on my shelves and that I had almost forgotten about. I've got an old oscilloscope that used to be my great-uncle's. (brand name Knight, model KG-635) It has a circular CRT with a green grid overlay and is based on tube technology (not just the display but all the other innards, too). It will show you the waveform but is not very accurate. The waveform jumps all over the screen as you're trying to measure it. Haven't used it in years, but it's still an interesting collectible. If I ever get back into electronics and find myself in actual need of an oscilloscope, I'd still have to invest in a modern one.
Also, in addition to both a Blu-Ray player and an HD-DVD player, I've got an old Pioneer LaserDisc player that somebody once gave me. It doesn't work. You can put a disk in it and it still shows "no disc" on its VFD display. I've got some LaserDiscs, so if I ever want to be able to watch them, I'll have to get on eBay and buy a working player there. (If you're not familiar with LaserDiscs, they're an early precursor to the DVD. They look like a CD but they're the size of a vinyl LP record and are packaged in a big sleeve like an LP.)
Then there's the UPS battery backup for my computers. It's the Geek Squad brand (one of Best Buy's house brands). When I bought it, I was sure to pick out one with an LCD display on the front. When I hooked it up, I discovered to my dismay that the display is only on for a minute and then it goes dark. You have to push the "display" button to see it again for another minute. (Now where's the fun in that?) I don't think it has an override to leave the display on all the time.
I have a similar one at work, made by APC, that also has such a display. I trust that one with a $25,000 piece of equipment. Unlike the Geek Squad one, you can set the APC to leave its display on all the time. These UPS displays have several modes, and I like to keep them on the wattmeter mode. If I need any more UPS units, at work or at home, I'm paying a little extra and going with the APC.