Movies that are on DVD, are not among the most popular, and/or are 20+ years old are commonly available for sale, as DVDs, on-line in essentially new condition

Movies that are on DVD, are not among the most popular, and/or are 20+ years old are commonly available for sale, as DVDs, on-line in essentially new condition used for about $2 plus shipping, usually of just a few dollars. If the movie is any good, will want to see it more than once, So, paying a few dollars for one view is a bit too expensive! I looked at their ad for their video introduction to playing violin. As I recall, they want $169 or so for their course. Seems high! In https://news.ycombinator.com/item?id=31903188 https://news.ycombinator.com/item?id=31903188 I give an introduction to playing violin.