I had this idea 10 years ago and even had a beta..but scrapped the whole project after a few months. I'm curious how you plan on making money. College student

I had this idea 10 years ago and even had a beta..but scrapped the whole project after a few months. I'm curious how you plan on making money. College students are notoriously cheap especially when the idea is that they are going to swap books as opposed to buy them.