Walmart offers the Vizio D-Series 55" 4K HDR Flat LED Ultra HD Smart Television for $329.99 with free shipping. That's $20 under our mention from five days ago and the lowest price we've seen. (It's the best deal now by $145.) Buy Now Features 3840x2160 (4K) native resolution Vizio SmartCast with Chromecast & Vizio WatchFree 802.11ac wireless USB port & 3 HDMI inputs remote control via smartphone with the SmartCast mobile app