Sell your textbooks online; many online vendors make it easy to sell textbooks to them. For example, sites such as Bookfinder and eCampus allow you to type in ISBN numbers in an easy to use online form. You will immediately receive a quote as to the offering price for your textbooks. Most online book buyers also pay for shipping costs if you accept their offer.
Sell textbooks yourself by creating an online listing. Websites such as Amazon, Half.com and Craigslist allow users to sell textbooks directly to the next consumer. Choose your preferred site, create an account and list your textbooks for a price you'd like to get.
Contact a bookstore. Some bookstores such as Powell's Books in Oregon will buy used textbooks. Sellers can opt to sell textbooks in-store or through their online website. Powell's looks for current, up-to-date textbooks that have enough demand in their stores to justify a purchase. Powell's sets an online buy back minimum at three books or five dollars in credit to process an order.
Visit a college campus bookstore. Many college bookstores buy back textbooks in good condition. However, college campus bookstores may not buy all textbooks presented to them. Factors such as the bookstore's current stock and demand for the textbook in upcoming classes affect purchasing decisions.