I know, that example is about the worst I ever heard.College textbooks are an especially bad example in reality. They've increased 10x in price in real terms since the 70s. Probably because of oligarchic consolidation and the buyer can't choose the textbook they use, it's assigned by the prof.
It's change change change for the sake of change because their buddy has a new edition $450 book to sell. No better, not updated, just a change. Books don't need to change every year.
So..the student can go online now and get just about every textbook free. Serves the nasty hustlers right. They did it to themselves.