Where can one find listings for people reselling their old textbooks?

* Amazon: Amazon has a large marketplace for used textbooks. You can search by ISBN, title, or author.

* BookFinder.com: BookFinder.com is a search engine that allows you to compare prices for used textbooks from multiple online retailers.

* CampusBooks.com: CampusBooks.com is a website that specializes in selling used textbooks. You can search by ISBN, title, or author.

* eBay: eBay is a popular online marketplace where you can find used textbooks. You can search by ISBN, title, or author.

* Half.com: Half.com is a website that sells used books, including textbooks. You can search by ISBN, title, or author.

* Powell's Books: Powell's Books is a used bookstore chain with a large selection of textbooks. You can search by ISBN, title, or author.

* ThriftBooks: ThriftBooks is a website that sells used books, including textbooks. You can search by ISBN, title, or author.