I buy mine in a combo pack at Office Depot...about $50.00 plus. Although lots of time they are out of stock. I will then buy them individually. One time, I checked and I could buy both individually cheaper than in a combo...go figure on that one. I usually use my Office Depot Rewards to buy my ink cartridges since none of their coupons apply to them. I also recycle my old cartridges and get a $3 credit for each one.