For in-store pickup only, Microcenter offers the Polaroid 55" 2160p 4k LED LCD HD Television, model no. DE550M3N4AU-YA4, for $599.99. That's $189 under the lowest shipped price we could find for this model elsewhere. Features include 3840x2160 resolution, 4000:1 contrast ratio, LED backlight, four HDMI inputs, USB, and PC input.
Update: Specs corrected.