L.A. Computer Company offers the refurbished Apple iMac Intel Core i5 2.7GHz 21.5" Desktop for $699 with free shipping. That's $200 under our mention of a new one from Black Friday week and the lowest price we've seen. (It's also a current low for a refurb by $181.) Features include an Intel Core i5-4570R 2.7GHz Haswell quad-core processor, 21.5" 1920x1080 LED-backlit display, 8GB RAM, 1TB hard drive, Intel Iris Pro 5200 graphics, 802.11ac wireless, two Thunderbolt ports, four USB 3.0 ports, FaceTime HD camera, Bluetooth 4.0, Gigabit Ethernet, and OS X El Capitan.
Note: A 90-day L.A. Computer Company warranty applies. Also, this doesn't include a keyboard or mouse.