Finally, ReDigi’s sales are likely to undercut the “market for or value of the copyrighted work” and, accordingly, the fourth factor cuts against a finding of fair use. Cf. Arista Records, LLC v. (rejecting application of fair use to P2P file sharing, in part, because “the likely detrimental effect of file-sharing on the value of copyrighted compositions is well documented.” (citing Metro-Goldwyn-Mayer Studios Inc. v. Grokster, Ltd., The product sold in ReDigi’s secondary market is indistinguishable from that sold in thelegitimate primary market save for its lower price. The clear inference is that ReDigi will divert buyers away from that primary market