One popular platform is BooksRun. They offer a straightforward process: you enter the ISBNs of your textbooks, and they give you an instant quote. If you agree with the offer, you ship the books to them for free, and they pay you once they receive the books and verify their condition. Another option is to
sell textbooks on local classifieds like Craigslist or Facebook Marketplace. This can sometimes get you a better price, as you're dealing directly with buyers. College bulletin boards and campus groups are also great places to advertise your books. Just be sure to highlight that they are in brand new condition, which can be a strong selling point.