The Nikon D810 body only currently goes for $2800 at authorized dealers which are allowed by Nikon to include a variety of free extra accessories and promotional rewards (eg Adorama and B&H Photo and Amazon).
But if you are comfortable with grey-market imported camera gear that comes with a 1-year warranty from the seller (not Nikon USA), then among the offers bubbling around the eBay Deals is the new condition imported grey-marked Nikon D810 body only offered for $2220 with free shipping and a 1-year warranty from the seller “Get It Digital” (99.5%), not Nikon USA. Limit three per customer. Nearly 1000 units got sold from this listing so far according to the page over there.
As usual with situations like this, it is up to you to decide where you draw the line on risk vs price vs other related trade-offs.