Groupon offers the refurbished Hisense 50" 4K LED LCD Ultra HD Television, model no. 50H7GB1, for $529.99. Coupon code "VISA5" drops it to $503.49. With free shipping, it's $45 under the lowest total price we could find for a new unit. It features a native resolution of 3840x2160p (2160p), LED dimming, WiFi, Smart TV apps (YouTube, Netflix, Vudu, etc.), three USB ports, and four HDMI ports.

A 90-day Sohnen warranty applies.