Walmart offers the Avera 55" 4K WiFi LED-Backlit LCD Ultra HD Television, model no. 55EQX10, for $278.04 with free shipping. That's $71 under our Cyber Monday mention and the lowest total price we've seen for any 55" 4K HDTV. (It's the best deal now by $71.) It features a 3840x2160 native resolution (4K), WiFi, USB, cast mobile devices via Apple TV or Chrome Stick, and three HDMI inputs.