Over half the books I bought in college were singularly bought in order to open up an envelope inside the cover, read a code, log into a website, and then maybe use the book ONCE after that. The books were anything from $100-$500 each, and they'd give you like, $30 when they bought it back.

Another part of the scam was the fact that you could only get your student loans a month or two after classes had started, so if you needed books, you HAD to buy them from the college bookstore, where they were massively marked up. They would take the total out of your student loans or grants before you even got them. Everything from $2 bookmarks (a sliver of paper.) to $100 hoodies with nothing but a small IU logo on them. Packs of 5 pencils for $8, you name it.

They made sure to delay student loans so that when you borrowed materials from the college store, you paid an insane markup. The poorer student obviously get fleeced the worst.