Is it legal to sell your old MP3s?

Jason Schultz quoted in National Public Radio, Planet Money blog, March 20, 2013

The ruling means “you can’t have the ghost of copyright following the object around and policing it,” said Jason Schultz, a law professor at UC Berkeley who filed an amicus brief on behalf of the student. When I talked to him yesterday, he told me the case has important implications for interpreting “first sale” doctrine in the digital world.