Best Buy offers the Rocketfish Remote Wireless Shutter Control for Canon, model no. RF-RSCWLC12, for $9.99. Opt for in-store pickup to dodge the $2.99 shipping fee. That's $10 off and the lowest total price we could find. This remote control eliminates vibration caused by manual shutter depression. It's compatible with most Canon DSLR cameras and requires a CR2025 battery (included).