Big Valley Inc. via eBay offers the factory-refurbished Apple iMac 21.5" Intel Broadwell Core i5 All-in-One Desktop with Retina Display, model no. MK452LL/A, for $999.99 with free shipping. That's $150 under the lowest total price we could find for a refurb elsewhere. It features Intel Broadwell Core i5 3.1GHz quad-core CPU, 21.5" 4096x2304 4K IPS Retina display, 8GB RAM, 1TB hard drive, Intel Iris Pro Graphics 6200, 802.11ac wireless, Gigabit Ethernet, Bluetooth 4.0, Magic Keyboard and Mouse 2, four USB 3.0 ports, two Thunderbolt 2 ports, and Mac OS X 10.12 (Sierra). A 1-year Apple warranty applies.