i can't tell if you're being sarcastic or joking...
but either way, power to you for doing it! I figure if there's no way to purchase the tunes, nobody will pay for em. But atleast if there's a way to purchase them... maybe 1 in 100 of those downloads might have paid,... why not try. Atleast you'll know what the real value of the music is.
If it doesn't work... you can always go back to giving it away. But if you never try,... you don't know.