http://buybox.herokuapp.com/

Buybox was a project by 9 University of California, San Diego students. We set out to redefine marketplace. Our two major goals were to cut out the clutter and make it amazingly simple to list and buy products on university campuses (it takes less than 45 seconds to post an item from a smartphone). Next goal was to bridge the gap between online marketplace and offline marketplace and therefore we have integrated some unique features such as purchase with QR Code to make it simple to sell your digital goods offline.