Reply to Selling my VCI 300

I'm pretty much certain that I want to upgrade from my vci 300; I have either the S4 or the MC6000 in my sights - leaning more towards the S4 though.

What I want to know is: what is a good place to sell my current controller?

At the moment I can believe of either eBay or amazon to try and sell it, however I had a bad experience trying to sell my xbox on eBay a few years ago, so I would rather not go down that route.

tl;dr Are there any other easier or reliable methods I can use to sell my controller apart from eBay or amazon?