Bonavendi will help you determine which site will pay you the most for your used textbooks, books, CDs, DVDs and video games. Just enter the barcode, ISBN, or UPC number in the box provided and compare the vendors’ quotes. You can also enter multiple numbers at once to see which vendors will buy the most items at the best price. Click on the vendors with the offer you prefer and you will be forwarded to that website where you can sell your items. There is also a Bonavendi app for smartphones where you can scan the barcode rather than entering it to make the process even faster.