It's simply not worth it. I might pay for an MP3. It depends on the price. MP3s are ephemeral. All of your computer files are ephemeral.
Computers get upgraded, files get lost, disks crashes, backups fail.
All of this happens with far more frequency than, say, the number of times your CD gets scratched or broken. When I buy a CD now, I view it as buying a disk of MP3s with a builtin backup. What I listen to are the MP3s. I don't have to back them up, the backup is sitting in the basement. I want off the server.