Selling your used books and textbooks for the highest price just became faster and easier with Flipsy's new BookSeller app. BookSeller turns your smartphone into an ISBN scanning device that quickly scans a book's ISBN and instantly displays market values and buyback offers. BookSeller is free to download and use, and does not require registration or in-app purchases. To use BookSeller, simply launch the app and follow the prompts to scan your book's ISBN. The app will then display what you can expect to be paid if you sell your textbook on sites such as Craigslist and eBay. It also displays trade-in and buyback offers from dozens of vendors. If you like an offer, the app will connect you with the buyer to complete the transaction and get paid. Flipsy's BookSeller is the fastest and easiest way to sell your used textbooks for the best price.