Walmart offers the Vizio D-Series 55" 4K LED-Backlit LCD Ultra HD Television, model no. D55un-E1, for $398 with free shipping. That's $150 off list and tied with our mention from two weeks ago as the lowest price we could find. It features a 3840x2160 (4K, 2160p) native resolution, full-array LED backlight, and three HDMI inputs.