Got screwed a few times this year with that.
> forced to buy new textbook because the new edition was required for class, no used editions available since it was a brand new edition
> semester end comes, I go to sell it back to the bookstore...they won't accept it because a new edition is out for next year, making my copy obsolete over the course of 4 months.
> I burn down the entire campus, become iron man, and play Yahtzee with Optimus Prime because fuck you that's why