At Quiksilver, search for "AHEDM001" to find the GoPro Side Mount (pictured), model no. AHEDM001, for $9.10. Coupon code "SALE40" cuts it to $5.46. With free shipping, that's the lowest total price we could find by $4. It lets you attach your GoPro to the side of helmets, vehicles, gear, and more.

Of note, search "ANDMK301" to find the GoPro The Frame Camera Mount, model no. ANDMK301, for $28. Coupon code "SALE40" drops it to $16.80. With free shipping, that's another price low, this time by $23. This is designed for use with the HERO 3 cameras only.