I can guarantee that in 1987 very, very few people had a copy of the HS. I was dying to get my hands on a copy ever since seeing it air in 1978, but I still didn't manage to turn one up until around 1994.

A chance conversation with a college classmate back in 1990 turned very interesting when they told me they had a copy on Betamax that had been in their family video collection since 1978! Unfortunately, by the time the tape was located, a younger sibling had taped it over with cartoons!