Walmart offers the refurbished Vizio 58" 4K 2160p WiFi LED-Backlit LCD Ultra HD Smart Television, model no. D58u-D3, for $599.99 with free shipping. That's tied with our mention from two weeks ago as the lowest total price we've seen for this model in any condition. (It's also $150 below the cost of a new model now.) It features a native resolution of 3840x2160 (2160p), full-array LED backlight, Ethernet, WiFi, Internet apps, USB, and five HDMI inputs.
Note: No warranty information is provided.