Walmart offers the refurbished LG 60" 4K 2160p LED-Backlit LCD Ultra HD Smart Television, model no. 60UH6090, for $599 with free shipping. That's $587 under the lowest price we could find for a new unit. It features a 3840x2160 (2160p) native resolution, LG smart apps, and three HDMI inputs.
A 90-day warranty applies, but it is unclear who backs it.