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 tied with last week's mention and the lowest price we could find by $66. It features a 3840x2160 (4K, 2160p) native resolution, full-array LED backlight, and three HDMI inputs. Deal ends December 14.