Dell Small Business offers its Dell 27" 4K Ultra HD IPS LED-Backlit LCD Monitor, model no. P2715Q, for $524.99 with free shipping. That's the lowest total price we could find by $95, although we saw it for $21 less in November. It features a 3840x2160 native resolution (four times that of 1080p), LED backlight, four USB 3.0 downstream ports, one upstream USB port, HDMI, DisplayPort, and mini DisplayPort.