I got two freebies, back when I was actively collecting.
A turquoisey Eskimo box fan, that a small local restaurant used to use to draw hot air out of their kitchen. Needless to say, it was a bit greasy. But, it cleaned up pretty nice, and seems to work fine.
Another one was an oscillating Westinghouse; probably a Lively Air. It's also turquoise.
I've done nothing with that one since rescuing it from the trash. I don't do mechanical work on anything; I just clean them up. This one would need work, as the cord was cut off, and the motor is very stiff. You can turn the blades by hand, but it's not easy. It looks pretty, though.
Barry