Castle Ink has by far, the best prices I've seen around! I could buy double what I would be able to at other retailers. The quality was the exact same as other sellers, but the prices were so much better. I contacted them with some questions I had, and had a prompt response with a very friendly and helpful representative! The delivery was very fast, only a couple of days, and the shipping was very reasonable. I will definitely be dealing with Castle Ink for all of my ink needs, and referring all of my friends to them! Don't even think twice about using them, just do it!