Walmart offers the refurbished Samsung 54.6" 4K HDR Flat LED Ultra HD Smart Television, model no. UN55MU800D, for $459.99 plus $19.97 for shipping. That's tied with our mention from three weeks ago and $120 less than the lowest price we could find for a new unit. Features include:
3840x2160 (4K) native resolution
802.11ac wireless & Bluetooth
Smart TV with Apps (including Netflix, Amazon Video, Hulu, more)
3 USB ports & 4 HDMI inputs
Note: A 90-day warranty applies, but it's unclear who backs it.
Uncle Sam could take a hefty chunk of your retirement income if you botch this.