Walmart offers the Seiki 39" 4K2K 120Hz 2160p LED-Backlit LCD Ultra HD Television, model no. SE39UY04, for $299 with free shipping. That's $50 under our mention from last week the least expensive 4K TV we've seen. (It's also a current price low for this model by $91.) It features a 3840x2160 resolution — four times that of 1080p TVs. It also has a 120Hz refresh rate, LED backlight, USB, and three HDMI inputs.