<p>Are old readers sellable? Or are they just disposable once you're finished with the class? What's the marketing hub for old readers?</p>
<p>It’ll depend on the class. Generally you’ll only be able to sell them if the professor teaches the same course in a subsequent semester. You can try to figure out if this will be the case by going to Ninjacourses and seeing who the professors have been for the past handful of semesters. If this isn’t the case, there’s a club on campus that accepts donated readers and tries to give them to someone else or recycles them; that’s always an option too.</p>