Walmart offers the refurbished Vizio SmartCast 55" 4K Flat LED Ultra HD Home Theater Display, model no. E55-E1, for $349.99 with free shipping. That's tied with our April mention of a refurb, $56 off, and the lowest price we've seen. It features a native resolution of 3840x2160 (4K), Vizio SmartCast technology with integrated Google Cast, and four HDMI inputs.

Note: A 90-day warranty is included, but it's unclear who backs it.

Update: The price has dropped to $339.99.