Walmart offers the refurbished Vizio 55" 4K 2160p 120Hz LED-Backlit LCD Ultra HD Smart TV, model no. M55-C2, for $615.88 with free shipping. That's $30 under our November mention of a refurb and the lowest total price we've seen for it in any condition. (It's a current low for a refurb by $124 and $232 under what you'd pay for a new one today.) It features a 3840x2160 (2160p) native resolution (four times that of 1080p), 120Hz refresh rate, 802.11ac wireless, Internet Apps (Netflix, Hulu Plus, Amazon Video, more), and five HDMI ports.

No warranty info is included.