Navegando por internet he dado un con una web en la que venden música de autores independientes que puede resultar muy interesante a aquellos que les guste descubrir nuevos talentos. Un punto a favor es que puedes escuchar online la música antes de comprarla por lo que sabes de antemano que vas a recibir.

http://cdbaby.com/about

CitarWho/What are we?

    * CD Baby is a little online record store that sells albums by independent musicians.
    * [In•de•pen•dent: (adj.) Not having sold one's life, career, and creative works over to a corporation.]
    * We're just a bunch of people in a cool Portland, Oregon, warehouse that looks like a playground. We listen to every album we sell before we sell it, so we can help you find other albums you'll like.
    * We only sell music that comes directly from the musicians. No distributors. Musicians send us their music. We digitize and warehouse, sell them to you, and pay the musicians directly.
    * Cool thing: in a regular record deal or distribution deal, musicians only make $1-$2 per album, if they ever get paid by their label. When selling through CD Baby, musicians make $6-$12 per album, and get paid weekly.
    * In business, and thriving, since March 1998. We're one of the largest sellers of independent music on the web.
    * Here's our Wikipedia page, for more info.

Según comentan la mayor parte de las ventas van directamente a los músicos por lo que si compramos un disco sabemos que estamos pagando realmente al autor
http://en.wikipedia.org/wiki/CD_Baby

Por poner un ejemplo os pongo a Isisip, que es una compositora china (os recomiendo que escuchéis la primera canción):
http://cdbaby.com/cd/isisip