50-Piece GoPro Accessory Kit, $9 with code K3F4XN62

We see deals on third party GoPro accessory kits all the time, but even by our standards, $9 is cheap. This set includes 40 different accessories, including harnesses, mounts, a floating bobber, and even a carrying case. This will also work with any other action cams with GoPro-compatible cases, including the Yi.