Best Buy offers the Insignia 54.5" 4K 2160p WiFi LED-Backlit LCD Ultra HD Roku Smart Television, model no. NS-55DR710NA17, for $499.99 with free shipping. That's $100 off list and the lowest total price we could find. It features a 3840x2160 (4K) native resolution, WiFi, Roku media streaming (including Netflix and Hulu Plus), USB, and four HDMI inputs. Deal ends May 30.