When should I sell my books back? August 07, 2021 21:31 Updated We buy books all year long, but the best time to sell books back is during finals. https://www.universitycoop.com/buybacks Related articles Can I sell my books in-store? How much are my books worth? Can I sell my books online? What do I need to sell my books? Can I sell back books that I didn't buy at the Co-op?