I just won 7 mortice cylinders (American lock co) from an auction site. I also have access to a machine shop, and I'm better than decent with a mill. I am definitely going to spend some time making a cutaway of at least one of the locks (for practice and display). If anybody is interested in buying one let me know, and i'll consider making more than one cutaway. As soon as I recieve and cut one of the locks i'll post pictures.
I figure something like 15USD is appropriate, let me know what you think.