Walmart offers the Polaroid 55" 2160p 4K LED-Backlit LCD Ultra HD Television, model no. DE550M3N4AU, for $459.99 with free shipping. That's $15 under our June mention and the lowest total price we've seen. (It's also a current low by $30.) Features include a 3840x2160 native resolution, LED backlight, USB, and four HDMI inputs.