Adorama via eBay offers the Dell 27" 4K Ultra HD IPS LED-Backlit LCD Monitor, model no. P2715Q, for $449.99 with free shipping. That's $90 under our mention from a month ago (which came bundled with a $150 Dell gift card) and the lowest total upfront price we've seen. (It's a current best by $53.) It features a 3840x2160 native resolution (four times that of 1080p), LED edge-light backlight, four USB 3.0 downstream ports, one upstream USB port, HDMI, DisplayPort, and mini DisplayPort. Deal ends September 30.