Adorama through eBay has the GoPro HERO4 Black 4K Action Cam for $399.99 (499.99 – 100 instant savings) with Free Shipping for a limited time.

The GoPro HERO4 Black Action Camera features 4K high-definition video recording at high frame rates, ultrawide-angle glass lens, QuikCapture, built-in microphone, built-in Wi-Fi and Bluetooth, and waterproof housing (up to 131 feet).

Adorama through eBay also has the previous generation GoPro HERO3 Black 4K Action Cam for $349.99 with Free Shipping for a limited time.