GoPro Hero4 4K HD Action Camera for $449.99 Shipped
GoPro CHDHX-401 Hero4 4K HD Action Camera for $449.99 shipped. Here is a screenshot for reference. It features 4K resolution at 30 frames per second or 1080p resolution at 120 frames per second, along with connectivity via Wi-Fi and Bluetooth. Most places have it for about $499.
2 very similar deals were also reported by some other sources: