How to sell?

I have a Shure V15 Type V-MR. The box's wrapper is intact, and never been opened. I'm a newbie and would like to sell it. How do I do that?
Post it to the classifieds.
e-bay, buy it now for $500.00.
I asked "how?". Where can I learn how to post to the classified?
If you havent gotten yet, click on the " sell " tab and go from there.....