Last year an old lady less than half a mile from me had her grandkids put up a vague post on RGP about "an old pinball machine that has been in our basement 30 years ... doesn't work ... first reasonable offer...".
Turns out she had a Gottlieb Knock Out in gorgeous shape under 30 years of dust, a highly sought after EM with playfield animation worth thousands...
...no, I didn't get it. And I could have walked it home.