For in-store pickup only, Kmart offers the Upstar 55" 4K 2160p LED LCD UHD Television, model no. P55EWX, for $649.99. That's the lowest price we could find by $50. It features a maximum resolution of 3840x2160 (four times that of 1080p), USB port, and four HDMI ports.
Of note, Shop Your Way Rewards members will earn a Kmart credit with purchase and may be eligible for additional credits and discounts.