I gave the bulk of mine away and kept only those that had value to me still. While it's increasingly becoming harder for new students to use old text books due

I gave the bulk of mine away and kept only those that had value to me still. While it's increasingly becoming harder for new students to use old text books due to the habits of publishers releasing new versions yearly and educators go along with it, there is still a lot of value to a new student in a slightly older text. Regards, O.