Gravitybuys via eBay offers the 3.5-lb. Microsoft Surface Book Intel Skylake Core i7 2.6GHz 13.5" Touchscreen Laptop in Silver, model no. CS5-00001, for $1,699.99 with free shipping. That's the lowest total price we could find by $400. It features an Intel Core i7-6500U 2.6GHz Skylake dual-core processor, 13.5" 3000x2000 touchscreen LCD, 8GB RAM, 256GB SSD, 802.11ac wireless, Bluetooth 4.0, and Windows 10 Pro 64-bit.