Best Buy via eBay offers the Insignia 42.5" 2160p WiFi LED-Backlit LCD Ultra HD Roku Smart Television, model no. NS-43DR710NA17, for $299.99 with free shipping. That's tied with our July mention at $100 off and the best price we've seen for a 43" 4K Roku TV. It features a 3840x2160 (4K) native resolution, WiFi, Roku media streaming (including Netflix and Hulu Plus), USB, and four HDMI inputs.