Walmart offers the refurbished Samsung 49.5" 4K 2160p WiFi LED-Backlit LCD Ultra HD Smart Television, model no. UN50JU6500, for $429.99 with free shipping. That's $20 under our mention of a refurb from June, $470 off list, and the lowest price we've seen for this model in any condition. It features a 3840x2160 (2160p) native resolution, full-array LED backlight, 802.11ac wireless, Bluetooth, Smart TV apps (YouTube, Netflix, Hulu, etc.), USB, and four HDMI inputs.

Note: A 90-day warranty applies but it's unclear who backs it.