Walmart offers the refurbished Samsung 55" Nano Crystal 4K LED-Backlit LCD Ultra HD Smart Television, model no. UN55JS700D, for $549.99 with free shipping. That's $50 under our mention from four days ago the lowest total price we've seen for any 55" Samsung 4K TV. (It's also $317 below the best price we could find for a new one.) It features a native resolution of 3840x2160 (4K), quad-core processor, screen mirroring, 802.11ac wireless, Internet Apps (like Netflix, Hulu Plus, and YouTube), USB, and four HDMI inputs.
Note: No warranty information is provided.