The app seems like a great and convienent way for college students to sell and buy their books from each other; however, would appreciate the app more if the features allowed you to put a "N/A" for the ISBN number for some textbooks that just happen to not have an ISBN# because they hand-made textbooks produced by a different company and or teachers themselves. Also, being allowed to manually upload a picture of the app ourselves from our phone would be great too. Otherwise, nice work on this app. Pretty helpful.
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