Ending today at 4 pm ET, Best Buy offers the Westinghouse 55" 4K LED-Backlit LCD Ultra HD Smart Television, model no. WE55UC4200, for $499.99 with free shipping. That's $200 off list and the least expensive 55" 4K Smart TV we've seen. (Similar Westinghouse models cost $150 more elsewhere.) It features a native resolution of 3840x2160 (2160p), WiFi, streaming apps (including Netflix, Vudu, and Pandora), USB 3.0, and three HDMI inputs.