I still have all of my college text books. Since the stores would give you pennies on the dollar (back in the late 80's early 90's) for books you sold back I just kept mine (even the non technical stuff).
Thrift stores used to have a nice selection of old school books people would donate after somebody died.
It's utterly hilarious. You can download pdf's of the 10th and I think 11th editions. They are so close to that version, 1984 or 1986, can't remember, I do actually have it, other then some newer material, it's nearly indistinguishable.