Dell Small Business offers the Dell UltraSharp UP2414Q 23.8" 4K Ultra HD IPS LED-Backlit LCD Monitor for $649.99. Coupon code "CTCBFMG8$BF92F" cuts the price to $584.99. With free shipping, that's $118 below our mention from three weeks ago and the best price we've seen. (It's a current low by $169.) It features a 3840x2160 native resolution (four times that of 1080p), LED backlight, 4-port USB 3.0 hub, and DisplayPort, mini DisplayPort, and HDMI inputs. Deal ends November 3.