Well, I bought it last weekend, and it arrived yesterday.
That right there is more than 5 pounds of genuine new, used, shiny filthy knobs, folks!
After a bit of sorting, I had a sandwich bag of nasty cheap friction-fit knobs, a little pile of loose set screws and this expanse of vintage industrial design.
A number of them are pretty distinctive and I'm curious about their origin. I think I need to start a thread for help IDing them.
In the long run, I'll probably sell or give away most of them. I'd hoped there were a few silver anodized aluminum knobs in the lot that would be suitable replacements for some missing or sub-par knobs on my power designs PSUs, but no such luck.