PeerFlix is a service that allows you to trade DVD’s for $1 and keep them as long as you want. They have been around for a while now….
Enter the Music version, LaLa. It’s the same concept, $1 to trade (plus shipping cost $0.49). You get the shipping envelope as well to ship it.  They even give 20% to the artist. As far as they say it is 100% legal. You can keep the cd as long as you want, or trade it on after burning listening to it.
There is no monthly cost at all, it is 100% free until you decide to get a cd. It does a good job at recommendations based on the band, etc.

The one major problem I have with this system, is the very few cd’s I still own, have no case. Without trading a cd you can’t get one. So this service doesn’t work that well for someone in my position.
Think of it as a service slightly more expensive than AllofMp3 but waaay cheaper than iTunes.
You can’t get CDs for $1 unless you send out some from your own collection – you can only get and many as you send.
So the real cost of a CD is $1 + your CD.
Typo. “as many as you send”, not “and many as you send”.
http://www.switchdiscs.com does something similar but for free and you can trade dvds, cds, and games all on the same site.