bs0d3 writes "After some litigation; ReDigi, a site where people can sell used MP3s has been found legal in America. One of the key decisions the judge had to make was whether MP3's were material objects or not. 'Material objects' are not subject to the distribution right stipulated in "17 USC 106(3)" which protects the sale of intellectual property copies. If MP3's are material objects than the resale of them is guaranteed legal under the first sale' exception in 17 USC 109. Capitol Records tried to argue that they were material objects under one law and not under the other. Today the judge has sided with the first-sale doctrine, which means he is seeing these as material objects."