Walgreens has a coupon available in this weeks ad for a ink cartridge refill for only $1.00 this week. Take that coupon along with your cartridges and get them filled. These normally run around $13 to have them refilled so this is a great way to get your ink and save some money. It's good for black and color.
I have never done this myself, but I would like to because this is a GREAT deal. Ink is SO expensive and when you print a lot of coupons, you use a lot of ink.