The Most Expensive Liquids In The World Surprised? So were we! And that’s not even the highest. But you should know that we are talking about inks of high quality from well-known brands. Companies spend great sums of money on the research and development of the best ink quality. 9. Black printer ink — $2,380 per gallon « Previous Page Next Page » Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 2017-11-01 news