@boomerang,
You are making the wrong argument-- at least with me. I am not arguing that books are more expensive (right now) than iTexts.
I am arguing that for a school, throwing away books that are no longer being used is the best way to deal with them. Anything else will be a waste of the schools time and resource dealing with paper that has very little monetary value, and will very likely never be used again anyway.
Storing huge stacks of paper that aren't being used and can easily be reproduced doesn't make any sense.
If these books are not being used, their value is $0.00. Keeping them has a cost, if you stick them in the cellar they will not only take up space, but in 5 years someone will have to take the time to figure out what they are and what to do with them.
There are only a certain number of books that a school can use. More than this number of books are useless, especially if there is limit space to display them. If the choice is to be made between new books and old books, most schools will rightfully choose the new books.
Because books are so cheap to manufacture, it really doesn't make economic sense to keep them around when they are not being used.
Storing and redistributing old books doesn't make economic sense. If it did, we would have a good way to do this.