Walmart offers the refurbished Samsung 40" 4K HDR Flat LED Ultra HD Smart Television, model no. UN40MU6300FXZA, for $269.99. Opt for in-store pickup to cut that to $267.26. That's the best price we could find on a refurb by $23. It features a 3840x2160 (2160p) native resolution, Smart TV apps (Netflix, Pandora, Hulu, etc.), USB, and three HDMI inputs.

Note: A 90-day warranty applies but it's unclear who backs it.