Cartridge Warehouse via Amazon offers this Canon PGI-220 / CLI-221–Compatible Inkjet Cartridge 10-Pack for $9.47. With free shipping, that's a buck under our June mention and is the lowest total price we could find for this ink in this quantity by $3. It includes four black, two cyan, two magenta, and two yellow. These cartridges fit several Canon PIXMA inkjet printer models.