What I have discovered is there a huge need for music for bloggers. If you made a track available free with the creative commons agreement that the user mentioned the artist if your music is used, I believe it would get picked up and shared virally on the internet. Send your link with the music sample to some heavy duty bloggers, and they will use it, share the artist and link, and your popularity will increase. If you then offer other pieces for sale, that is up to you. Everybody wants to charge for everything all the time, but it is about sharing, contributing, and helping others. It will come back to you tenfold. Good luck!