GoPro Floaty Backdoor for sale

GoPro makes an accessory that allows the camera to float to the surface should it ever come dislodged from its mount.

 I've come to the conclusion that I won't be needing mine for what I plan on using my GoPro for (diving), but I figured it might be more auspicious for a kayak fisherman on the surface.

It has never been used and remains in its original packaging. Asking $12. I'm in Santa Clara.