Has anyone heard of Book.ly?
It already has my university's course listings--I just picked my classes from the drop down menu, picked my professors and it spat out my textbooks and the best place to buy them!
When I initially heard about this, I presumed I'd have to search and didn't understand how it was different from Amazon. But it's basically an outside version of your school's bookstore because it lets your select based off of your particular courses, but it has way better prices.
/rec for other students.