Groupon offers the Polaroid 55" 2160p 4K LED LCD HD Television, model no. DE550M3N4AU, for $499.99. Coupon code "GOODS5" cuts it to $474.99. With free shipping, that's $25 below last week's mention and the lowest total price we've seen. (It's a current low by $25.) Features include a 3840x2160 native resolution, LED backlight, USB, and four HDMI inputs. Deal ends June 25.