I recently picked up a mint condition Nikon 16-35mm f/4 VR lens from fellow FMer mooneymse here. It's in absolutely perfect condition and comes with everything it would come with from new, including the receipt and blank warranty card.
After using it for a month or so, I'm ready to move up to the 14-24/2.8—just feel I'd like to go a little wider, and don't need as much overlap with my 24-70/2.8.
If anyone is looking to swap, send me a PM. Would prefer a 14-24/2.8 in the same condition as my 16-35/4, w/ box, pouch, papers, receipt, etc. Trade will involve some cash from me, obviously.