BCI-24 2-pack black ink cartridge is on sale for $3.44. This is one crazy price! If you have one of the canon models below quickly order a few packs.
Staples Compatible Inkjet Cartridge for Canon BCI-24B. For use with: i475D, i470D, i455, i450, i350, i320, S330, S300, S200, MultiPass MP370, MP360, F20, PIXMA iP1500, MultiPass MP390, PIXMA MP130, MultiPASS MP 320.
You can get this deal here.