Use MeritLine coupon code MLC802PN
MeritLine has this Canon BCI-6-Compatible Inkjet Cartridge 3-Pack plus 20 sheets of photo paper for $23.95. (It's the first option under "Buy More Save More"). Use the coupon code and the price drops to $12.95. It's compatible with Canon i9950, i9900, and i900D printers, among others. Shipping is free.