Adorama via eBay offers the 5.9-lb. Dell Inspiron 15 7000 Intel Skylake Core i5 2.3GHz 15.6" Touchscreen Laptop, model no. I7559-3762GRY, for $749.99 with free shipping. That's the lowest total price we could find by $184. (For further comparison, it's tied with our mention from three days ago of this system with just a 1080p display.) Features include an Intel Core i5-6300HQ 2.3GHz Skylake quad-core processor, 15.6" 3840x2160 (4K) LED-backlit touchscreen LCD, 8GB RAM, 1TB hard drive with 8GB SSD, Nvidia GeForce GTX 960M 4GB video card, 802.11ac wireless, Bluetooth 4.0, 6-cell battery, USB 3.0, HDMI, and Windows 10 Home 64-bit.