Walmart offers the refurbished Vizio M-Series SmartCast 64.5" 4K 2160p HDR LED-Backlit LCD Ultra HD Smart Television, model no. M65-D0, for $799.99. Choose in-store pickup to avoid the $49.97 shipping charge. That's $5 under our expired mention from four days ago and the lowest price we've seen for this TV in any condition. (It's also $435 less than the best deal we could find for a new one.) It features a 3840x2160 (4K, 2160p) native resolution, 4K upscaling, Google Cast (with access to Netflix, Hulu Plus, Amazon Video, and more), five HDMI inputs, and a 6" 720p 8GB Android tablet remote control with the Vizio SmartCast app pre-installed.
A 1-year warranty applies, but it's unclear who backs it.