GoPro's Hero4 Silver action cam is the best action cam for most people, and you can score a free $50 gift card with your purchase today on Amazon. We've seen a few slightly better cash discounts on eBay, but if you'd rather buy from Amazon, this is a great bonus. [GoPro Hero4 Silver + $50 Amazon Gift Card, $400]

If you'd rather have the Hero4 Black, which loses the touchscreen but gains 4K/3oFPS video capabilities and better slow motion, it's also $100 off on eBay. [GoPro Hero4 Black, $400]

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