Walmart offers the Vizio SmartCast 50" 4K 2160p LED-Backlit LCD Ultra HD Smart Display, model no. E50x-E1, for $398 with free shipping. That's tied with our mention from a week ago and the lowest total price we could find by $101. It features a native resolution of 3840x2160 (2160p), Smart TV apps, and four HDMI inputs.