Canon EF 24-105mm f/4L IS USM Lens for $639 – Deal Alert August 1, 2014 By Eric Reagan ebay (via deals-all-year) has the Canon EF 24-105mm f/4L IS USM lens for $639.99 (reg. $1149) in limited quantity and with free shipping. Check it out while it lasts here on ebay. ebay seller deals-all-year has a 99.8% positive feedback rating on ebay. The listing notes that you can register this lens for a 1-year Canon USA warranty.