Walmart offers the refurbished Samsung 55" 4K 2160p WiFi LED-Backlit LCD Smart Ultra HD Television, model no. UN55JU650DFXZA, for $599.99. Choose in-store pickup to avoid the $110.56 shipping fee. That's $120 below last month's mention of a similar new unit and tied as the lowest total price we've seen for any Samsung 55" 4K TV. (It's also $398 under the best deal we could find for a similar new model today.) It features a 3840x2160 (2160p) native resolution, quad-core processor, WiFi, Internet Apps (like Netflix, Hulu Plus, Pandora, and Amazon Video), USB, and four HDMI inputs.

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