Mikgadn via Amazon offers this 33-Piece GoPro Hero Camera Accessory Kit for $35.70 with free shipping. That's the lowest total price we could find by $14. It includes four thumb knobs, two buckle basic mounts for chest harness, two flat mounts, two curved mounts with adhesive pads, a sticker set for helmet mount, suction cup, two vertical surface J-hook buckle camera tethers with sticker elastic, adjustable head strap, and chest body strap.

Update: The price has increased to $36.65.