Refurbished Nikon D4 cameras used to sell for $5,199.00 few months ago. The price has now come down to $4,899.95 at B&H and $4,899.95 at Adorama. The Nikon US store still lists the refurbished D4 for $5,499.96.
I noticed also few other recent price drops on refurbished Nikon products – check the full list at Adorama and B&H: