My second printer is a Canon BJC4400, and when it needed cartridges, I started shopping around. I found a very good buy on them on E-Bay and purchased several. The black ink cartridges I purchased were very good and worked well. They lasted through many printings and were well worth the time it took to find them at a good price. I only use genuine Canon cartridges in my printer, so I was very pleased to find the ones I need. I was not sure I could find them at a reasonable price, as the printer is an older model. I am very pleased with this purchase.
Probably the best deal around are expired OEM ink cartridges. Manufactures put dates on their ink cartridges to push sellers to toss old stock and buy new. Ink cartridges have a much longer real shelf life than the twinkie (which is very long)
I recently purchased ink cartridges on e-bay and was well satisfied. I wish I had thought to do this a long time ago! Much cheaper! This will be the way I will purchase my ink cartridges from now on.