Based on ink/toner prices at NewEgg and page estimates at the manufacturers' sites, the Xerox costs $0.05 a page ($0.03 if you assume just black), the Brother laser $0.02, the Brother inkjet $0.04 (about the same for just black), and Lexmark doesn't seem to want to give a page estimate for its cartridges, but the color cartridges are not separate, so if you run out of blue way before you run out of other colors, too bad; you get to replace all of them.