This one isn't too bad, but several years ago, before I really got back into lighting, we were cleaning out the garage and I threw out a perfectly good Universal/MagneTek 14-15-20 trigger start magnetic ballast because I had no use for it. In my defense, I haven't had a use for it since then.

Also, I remember my late grandfather and me cleaning out his garage one day, and we threw away two 1970s shoplights (possibly Sears/Harmony House) that worked fine but were rusty and the paint was peeling off. They likely had full power HPF ballasts but it was a long time ago and I don't remember. I just remember that they ran the lamps nice and bright.