Walmart offers the Hisense 54.6" 4K 2160p HDR LED-Backlit LCD Ultra HD Smart Television, model no. 55H6D, for $428 with free shipping. That's $40 off list and tied with our mention from two weeks ago as the lowest price we could find. It features a 3840x2160 (4K, 2160p) native resolution, full-array LED backlight, 4K upscaling, built-in dual-band WiFi, Smart TV apps (including Netflix and YouTube), three USB inputs, and four HDMI inputs.

Update: Specs have been corrected.