B&H has another great deal as part of their Optics 2016 Show Specials. They have the Sigma Sports 150-600mm f/5-6.3 DG OS HSM for $1749.00. You also get a free 10% reward ($174.90), a free Sigma 105mm filter, and a free Sigma USB dock. With about $300 of freebies, this is a fantastic deal for this lens. Regular price for this lens is $1,999.
There is a special coupon code embedded in the link, the discounted price shows up once you add the item to cart.