Canon takes 20% off all factory-refurbished Canon lenses via coupon code "D2B712". Sales tax is added where applicable. Coupon expires July 11. A 90-day Canon warranty applies.
A best bet is the the factory-refurbished Canon EF 50mm f/1.8 II Camera Lens (pictured), model no. 2514A002, for $100.79 before the above coupon, $80.63 after with $11.99 for shipping. This lens weighs 4.6 oz. and is intended for use with Canon EF-mount SLR cameras.