CompandSave offers the Canon-Compatible PGI-220 / CLI-221 Inkjet Cartridge 12-Pack
for $55.99. Coupon code "CRAZY220" drops it to $10.99
. Shipping adds $3.99
, or spend $50 or more to bag free shipping. That's $1.25/cartridge. These cartridges fit several types of Canon PIXMA inkjet printers. It includes six black cartridges plus two each of cyan, yellow, and magenta.