Walmart offers the refurbished Samsung 64.5" 4K 2160p LED-Backlit LCD Ultra HD Smart Television, model no. UN65KU6290, for $689.99. Opt for in-store pickup to dodge the $49.97 shipping charge. That's $160 under our March mention of a new one and the lowest price we've seen for a Samsung 65" 4K Smart TV in any condition. (It's $409 under the lowest price we could find for a new unit today.) It features a 3840x2160 (4K, 2160p) native resolution, 4K upscaling, WiFi, Smart Hub (with access to Netflix, Hulu Plus, Amazon Video, more), Bluetooth, USB, and three HDMI inputs.

Note: No warranty information is available, although the seller does offer a 90-day return policy.

Update: The price has dropped to $678.10.