GoPro through ebay has their Refurbished GoPro HERO4 SILVER 4K Action Cam for $234 ($324.99 new at B&H) with Free Shipping for a limited time.

The GoPro HERO4 Silver Action Camera features 4K video recording at 15fps (2.7K at 30fps or 1080p at 60fps), touch-screen display, ultrawide-angle glass lens, QuikCapture, built-in microphone, built-in Wi-Fi and Bluetooth, and waterproof housing (up to 131 feet).