Where can i sell my Zune mp3 for a good price?

I recently bought a Zune....
It is....
.4gb
.pink
.its the Zune bundle
.comes with case and headphones



I tried it out and i don't like it....



I wasted about $100 on it and i am trying to get atleast some of my money back....
about $80 bucks

(its barely used)
still includes the box and everything (except those little headphone caps (the pink ones) but who needs them?

So where can i sell it?