the library
Did you know you can download MP3s from the library? I know all libraries are different, but if I go to my library website, I can download 3 free MP3s a week. They have a lot of music - mostly stuff I don't like - but I found one of the albums I was looking for. Luckily it's only an EP! Of course you can also rent CDs at the library, but the one time I checked they didn't really have anything. Their MP3 website has tons of stuff.
I know you can also download books onto your Kindle/iPad from the library but I don't know anything about that since I still read real books for now.
I'm going through my CDs to get rid of now - jeez like every CD I own is from 1999 (which wasn't exactly a good year for music).