It's not too difficult nor expensive to buy a printer for a computer. However, printer ink cartridges are quite expensive and people try a lot of ways to buy them at lower costs. So how to refill ink cartridges? You can buy refillable ink cartridges and add the ink yourself if you think you can do it, as it can sometimes be a little tricky. There are discount ink cartridges one can find but you'll have to search the net and you never know what you might get your hands on. Compatible ink cartridges can be a good idea if you can find them, but sometimes some of these products do not contain a lot of ink so you end up having to buy some more quickly. As for Canon ink cartridges, they can be found on various websites or you can just call major electronics stores that carry these brand names. HP ink cartridges are another well-known bran name product that can be found just about anywhere. Just make sure you know what you're buying when you find cheap ink cartridges.