Even if I wanted to sell my CDs, I probably couldn’t, and I actually like that, too. Used CDs are worth virtually nothing now. But the upside of this is that you can buy older albums on disc for virtually nothing. I’m sympathetic to arguments that Amazon is an evil empire, but I must admit to conspiring with the enemy to build my collection of Miles Davis and Joni Mitchell albums, at prices much lower than the downloads. Accumulating has never been easier, and my shelf space never tighter.