Sell your used textbooks to the University of Colorado Bookstore using this instant price quote app! It allows you to scan the barcodes of books that youd like to sell using your phones camera. Youll find out instantly how much well pay you for your used books. Please note: This application is able to use your camera to scan barcodes, however the camera on IPod Touch doesnt have the resolution to capture barcodes reliably. But, you can always type in your ISBN. If you have any trouble, please let us know!