Another great deal: Adorama is currently selling refurbished Nikon D4 cameras for $2,995.95 on eBay (used D4 are selling for more). The cameras are refurbished by Nikon USA and come with 90 days USA warranty and free shipping.
You can get the same deal directly from Adorama:
Update – the price of a grey market Nikon D810 is now down to $2,249.