Price-match between Amazon, Barnes and Noble, and other websites like Chegg, as well as your school's bookstore - I was told that renting is a great option, and is often the cheapest. Amazon and B&N both rent textbooks (and your school probably does too), and buying used copies from sellers on both of those sites (and sites like Chegg) are generally good too - I've had no issues doing that in the past. I am in the process of buying the seven textbooks I need, only one of which I needed to buy new because we need the access code, and it looks like I will be able to get them ALL for a total of under $350! What I did was set up a spread sheet and compare both purchasing and renting options, where applicable from all the sites I mentioned, and selected the cheapest option for each. In some cases, renting from the bookstore was NOT as cheap as renting from Amazon, sometimes the school had the best deal, some were not available for rental so I found the cheapest used price, etc. You just have to do a little legwork, and KNOW the edition you are supposed to have (if the ISBN is provided, even better).