Walmart offers the refurbished Vizio 60" 4K 2160p SmartCast Chromecast WiFi LED-Backlit LCD Ultra HD Television for $459.99 with free shipping. That's the best outright price we've seen and $170 under the price of a new one today. It features a 3840x2160 (4K 2160p) native resolution, full-array LED backlight, octa-core processor, WiFi, Bluetooth 4.1, Vizio SmartCast technology with integrated Chromecast (including access to Netflix, Hulu, Spotify, etc.), and four HDMI inputs. It does not include a tuner.
Note: A 90-day warranty applies, but it is unclear who backs it.