cheapest place to buy ink for hp printer?
One of the cheapest places to buy ink for HP printer is at http://www.shopping.hp.com/en_US/home-office/-/products/Ink_Toner_Paper/HP%20Ink. This website has a variety of HP inks at very reasonable prices. You only need to choose your printer type and get the preferred inks for it.
Garage sales are the cheapest places. Saturday mornings. You'll find some :)