Get this Panasonic 55" 4K 120Hz Smart HDTV (model TC-55CX420U) for $499.99 plus free shipping at Walmart.com. This was the lowest price we found by $50 and it's the lowest price we've seen. This is a 120Hz TV capable of displaying up to 4K resolution and has built-in WiFi for streaming content from the web, including Netflix, which has some of its shows broadcasting in 4K. Sales tax is charged in most states.