When I was in grad school in the late 80s, there was a table in the lounge area where people would put unwanted things when they moved out of an office. One day, a nice tabletop cabinet radio (tube type) showed up there. I went by later and it was plugged in and playing; it sounded good, so I took it home (still have it). I’m sure that some kid plugged it in, turned it on, decided it didn’t work, and wandered off.
Didn’t wait for the tubes... :)