Walmart offers the Seiki 50" 120Hz 4K2K 2160p LED-Backlit LCD HD Television, model no. SE50UY04, for $449 with free shipping. (Amazon offers it for the same.) That's tied with our mention from ten days ago and the lowest total in-stock price we could find by $130. It features a 3840x2160 resolution — four times that of 1080p TVs. It also has a 120Hz refresh rate, LED backlight, and three HDMI ports.