Walmart offers the Samsung 50" 4K HDR Flat LED Ultra HD Smart Television, model no. UN50NU6900BXZA, for $327.99 with free shipping. That's tied with our mention from a week ago (although we saw it quite briefly for $300 five days ago at Micro Center) and the lowest price we could find now by $70. It features:
3840x2160 (2160p) native resolution
Smart TV apps (YouTube, Netflix, Hulu, etc.)
2 HDMI inputs
You can save a ton of money — especially if you spot any of these items.