I bought this new in Spring and used it in my Z for a couple months until I traded in the car. Features built-in nav, bluetooth, iphone compatible, AppRadio, etc. It's basically brand new, l'm asking for $375 shipped (Paypal only, shipped within continental U.S). It looks like new ones are going for $650 and up on eBay, so I think the price is very fair.
http://www.pioneerelectronics.com/PU...on/AVIC-X850BT
I pictured everything I'm including; the unit plus all wiring/cables, documentation, still have all of the original packaging. Already wired for a 370z (I had a base interior, if it matters).
Let me know if you have any questions.