Ebay is where I got the last ones of mine for less than half price including shipping and they work great. They refill the catridges to keep the costs down.
My printer stresses not to refill the cartridges. I went thru one printer that they replaced, so I am think I should not refill or use refilled cartridges. I have a HP C7280 all in one printer. Where is a good place to purchase printer cartridges?
Think about how cheap the printers nowadays and how expensive the ink catridges are. If you had refilled catridges two or three times then that would make up the cost of a new printer (which comes with a set of ink catridges).