Walmart offers the refurbished Vizio 55" 4K 2160p LED-Backlit LCD Ultra HD Smart Television, model no. D55U-D1, for $479.99 with free shipping. That's $50 under our mention of a refurb and the lowest total price we've seen in any condition. (It's $218 under the best deal we could find for a new one today.) It features a 3840x2160 resolution, 802.11ac wireless, Internet apps (including Netflix, Hulu Plus, and Amazon Video), USB, and five HDMI inputs.

Note: No warranty information is provided.