When renting textbooks, you won’t be able to sell them for additional cash at the end of the semester. It’s smart to estimate how much you could sell a book for so you can determine if you will truly save money by renting. You should also find out if the book is used for more than one class, because renting a textbook twice could actually cost more than buying it. Finally, think about whether you might want to keep the book as a reference guide once the course is over. Many legal and medical students rely on college textbooks to help them in the workplace after graduation. In this instance, buying materials rather than renting them is a long-term investment for many people.