Walmart offers the Polaroid 50" 4K HDR Flat LED Ultra HD Smart Television for $259.99 with free shipping. That's the lowest price we could find by $67, although most retailers charge $400 or more. (We saw it for $70 less in December.) It features a 3840x2160 (4K) native resolution, Smart TV apps (Netflix, YouTube, Vudu, more), and three HDMI inputs.