GoPro through ebay has their Refurbished GoPro HERO4 Black 4K Action Cam, model no. CHDNH-B11, for $203 with Free Shipping for a limited time. To get the discount, use the coupon code: PSHOPTECH417 at checkout. It comes factory sealed and with a 1-year GoPro warranty.
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).