HP offers its HP Omen 870-100xt Intel Skylake Core i5 2.7GHz Desktop PC, model no. X9Q71AV_1, for $849.99 with free shipping. That's $200 off list and the lowest total price we could find. Features include an Intel Core i5-6400 2.7GHz Skylake quad-core processor, 8GB RAM, 1TB hard drive, AMD Radeon RX 480 graphics, 802.11ac wireless, Bluetooth 4.2, and Windows 10 Home 64-bit. Deal ends March 25.
Of note, HP doesn't specify whether this is the 4GB or 8GB GPU.