Walmart offers the Vizio D-Series 54.5" 4K HDR Flat LED Ultra HD Smart Television for $398 with free shipping. That's $30 under our mention from a month ago and the lowest outright price we've seen for a new one. (It's the best deal today by $19, excluding the below mentions.) Features include:
  • 3840x2160 (4K) native resolution
  • HDR10 & HLG
  • 802.11ac wireless
  • SmartCast TV with Chromecast (with access to Netflix, Hulu, Amazon Video, more)
  • compatibility with Amazon Alexa and Google Assistant for voice control
  • USB port & 3 HDMI inputs
A close price: Dell Small Business and B&H Photo Video offer it for $399.99 with free shipping.