Walmart offers the refurbished JVC 55" 4K 2160p LED-Backlit LCD Ultra HD Television, model no. LT-55UE76, for $276.66 with free shipping. That's $83 off and tied with our mention from three weeks ago as one of the cheapest 55" 4K TVs we've ever seen. It features a 3840x2160 (2160p) resolution, LED backlight, USB, and three HDMI inputs.

Note: A 90-day warranty applies, but it is unclear who backs it.