Courtesy of Tom at Garage Sale Finds, where you can flip through the whole catalog. I suspect the (costly) films here were purchased primarily by elementary schools, because I remember watching a number of Disney flicks on the trusty projector in the 1970s. They were always the second tier films, though: Herbie, Snowball Express, The Apple Dumpling Gang, etc. I would have jumped around like a delighted madman if one of the teachers had busted out The Black Hole.
2 Warps to Neptune 
I remember having to sit on the gym floor and watch the Apple Dumpling Gang every year on the last day of school in my elementary days.