Don't know if it counts but my Star-Jet I'm piecing back together we all know and love was parted out and the cabinet was trashed. When I knew I was buying it I immediately had him dig the backbox light board out of the actual dumpster because I knew I would never find another one of those, thankfully the trash hadn't been picked up yet.
Not exactly the trash, or free, but did save it from then-imminent non-existence.