Adorama via eBay offers the Samsung 28" 4K Ultra 2160p LED-Backlit LCD Monitor, model no. U28D590D, for $399.99 with free shipping. That's $55 below our mention from Black Friday and the lowest total price we've seen. (It's a current low by $55.) It features a 3840x2160 native resolution (four times that of 1080p), LED backlight, two HDMI ports, and DisplayPort.