Meritline offers the Canon PGI-220 / CLI-221–Compatible Inkjet Cartridge 10-Pack for $17.95. (It's the second option from the top.) Coupon code "MLCS17PN" drops it to $7.95. With free shipping, that's a buck under our August mention and the lowest total price we could find for comparable ink in this quantity by $2. These cartridges fit several Canon PIXMA inkjet printer models.