Walmart offers the Vizio D-Series 55" 4K HDR Flat LED Ultra HD Smart Television, model no. D55x-G1, for $348 with free shipping. That's tied with last week's mention and the lowest price we could find by $132. Features include:

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