Groupon offers the refurbished Vizio 50" 4K 2160p WiFi LED-Backlit LCD Ultra HD Smart Television model no. M50-C1, for $499.99. Coupon code "VISA5" drops it to $474.99. With free shipping, that's $76 below our November mention of a refurb and the lowest total price we've seen it for in any condition. (It's also $123 under the best price we could find for a new unit now.) It features a 3840x2160 (2160p) native resolution, Smart TV (with access to Netflix, Hulu Plus, Pandora, and other Vizio Internet apps), USB, and five HDMI inputs.

A 90-day Refurb Service warranty applies.