Nikkor TC-20e II 2x teleconverter.
Just like new in the original box with all paperwork etc. Belongs to a friend and I'd buy it myself but I don't own any compatible lenses for it. It's the killer deal at $300. (price includes shipping to the continental USA).
Private message me here if you are interested.
Product Description Page Nikon:
http://www.nikonusa.com/en/Nikon-Produc … 0E-II.html
Lens Compatibility Chart Nikon:
http://www.nikonusa.com/en_INC/IMG/Asse … chart.html