The price of refurbished Nikon D600 + 24-85mm lens kit dropped again to $1,599.99 on eBay (free shipping via Roberts Camera, limited quantity available). A new Nikkor 24-85mm f/3.5-4.5 lens alone costs $600.
Adorama is selling the refurbished D600 body for $1,589 and the kit for $1,859.
New D600 camera body currently sells for around $1,800 on Amazon.