I didn't see a "marketplace" in the forums, so I'm posting this here.
I don't even know if we're allowed to sell anything here... If not, please remove this post. Sorry.
I have a *barely used* AVIC-N2 for sale on the my350Z forums. I'm asking $400, which I think is fair, since refurbs are selling on eBay for $600+ I say it's *barely used* because I sent my N2 in for service, and Pioneer kept it because I had it bypassed. After arguing with BestBuy over the terms of the service plan, they paid Pioneer to send me a new unit, which may or may not have been a refurb. (I worked at BestBuy at the time, so they really had no choice but to help me out) Shortly after that, I got a better-paying job (haha), traded in my Eclipse for a 350Z, and the N2 has been in the box since. (I upgraded to an AVIC-D3)
A link with more info and pictures...