BuyDig via eBay offers the LG 49" 4K 2160p WiFi LED-Backlit LCD Ultra HD Smart Television
, model no. 49UB8200, for $579
with free shipping
. That's tied with our expired mention from four days ago as the lowest total price we've seen. (It's a current low by $121.) It features a 3840x2160 (four times that of 1080p TVs) native resolution, WiFi content streaming (Netflix, Youtube, Hulu Plus, more), three HDMI inputs, and USB.