A funny story with the first pair, a father and son. They son who was about 16 years old seemed to have some knowledge of vintage computers by reputation, but not personal experience. They needed to rush out and the boy was sad that he didn't have time to try some BASIC programming. I told him that the Commodore 64 was my favorite and that he could always buy one at a reasonable price nowadays. Then Evan and Adam came in the door carrying a C64. I told them of his interest and they gave him the C64. This C64 was found in the Camp Evans Base Of Terror area, so it was exposed to the elements and probably not in working condition, but the kid loved it.
Just to build on the story: as Jeff said, this was a junk system that we were going to put in the "free" or $10 pile at VCF East anyhow. We don't ordinarily go around giving away computers. :) The value of the kid getting excited, attending our next repair workshop, and maybe becoming a member far exceeds the few bucks we might've gotten for it.