In case you are thinking to upgrade your current full frame Nikon DSLR camera to the upcoming D850, here are the numbers I got from Adorama trade-in department on how much they can pay for your existing Nikon DSLR camera:
Please note that the exact value will depend on the condition of your camera. You can choose cash or direct trade-in. For any other camera models you will have to fill out the online form.
Pre-orders: B&H | Adorama | Amazon | BuyDig | WEX | Jessops