There used to be this Russian site, that sells mp3's at a few cents each. Full albums cost like 6 to 8 bucks. Anyway they got involved in a lawsuit recently. Not sure how that went, but Russia don't have strong copyright infringement laws anyway. There were even allegations that the russian mafia was behind the site.
Anyhow, that was one of the best place to purchase mp3s, since you can choose which format and bitrate you want. And they have a disgustingly large collection of music. No silly drm or whatever shit like the iTunes store. Does anyone know what I'm talking about?