The absolute best place to get a refill for your printer ink is Walmart.com. This will save you money because it refills your old cartridge with a syringe type applicator and this can be done several times before you need to replace it. It also saves time, as the free shipping gets the package to you in three days usually.
It is possible to buy printer inkjet cartridges from Staples, Best Buy, Future shop, Grand & Toy, The Source, Office Depot and Office Supply Warehouse.
Brother printer inkjet cartridges can be found at many retailers, both in store and online. Office Depot, Office Max, Staples, Wal-Mart, and Target are good places to buy printer ink.
"Inkjet printer cartridges are available to buy at almost any store that sells office supplies or computers/printers and related supplies, including Staples, Office Depot, Walmart, Sears, or Bestbuy."
http://www.4inkjets.com/?AID=9224636&PID=630765 has many inkjet cartridges for very cheap. You can save up to 76% compared to buying in store. It is one of the best sites to buy inkjet cartridges.
You can buy inkjet cartridges wholesale at a variety of online sites such as Amazon, inkjetcartridge.com and cheapinkcartridges.com. I would also check with the manufacturer of the printers as they may offer a bulk discount if you purchase a large quantity.
Generally speaking, if you can get by with an inkjet printer, buy one which uses ink cartriges that are refills. These are the lowest cost ink cartridges.
Inkjet cartridges can be found at any office supply store or location that sells printers. Online vendors may offer lower prices, but shipping costs may eat into savings.
You can buy a wide variety of HP cartridges online, whether you're looking for computer printer ink, inkjet ink, laser printer ink, or toner for other devices such as xerox machines. The cartridges come in all different colors.
I have a Hewlett Packard printer so I use their cartridges. In a pinch I have also used Staples cartridges and they worked just as well. Just make sure whatever brand you buy that your printer model is listed on the package.
Online retailers that one can purchase an HP inkjet printer cartridge including Amazon and NewEgg. Retailers that offer both online and in store purchase options include Walmart and Best Buy.
One of the cheapest and most economical cartridges is the Jet Tec ink cartridge. It fits the Canon i9950 printer.
The best ink cartridges are the ones that are made for the model of your printer. When you buy a new printer, it will usually list the ink cartridge type it needs on the box or inside the box in which the printer came in.