Rhonda K, I love how organized you are! Which machines do you have with the 500+ page manuals?
I think my largest manual is around 100 pages. All of my machines are mechanical, some with electronic components, but no computers. Their dates of manufacture range from about 1975 to about 2005. They are all simple by today’s standards. When I do find original manuals, they are usually $10 - $30. I always prefer original manuals and do my best to locate them, even after making copies.