We had a local discount chain called Hill's which was a lower tier K-Mart (Kind of a Dollar General but with merchandise like a small K-Mart)
They would sell those in a big bin for like $2, they were pretty much work that no longer had a copyright, and taped on the cheapest tapes with cheap covers and at SLP speed instead of SP to save tape!
It was cheap junk then and I don't think time has helped it. No one who was forced to watch anything they put out as a kid would have fond memories and want it today.