Hi Durwood,

I believe that the Epson R1800 uses 14ml cartridges. The higher end printers, like the 3880 run on 80ml cartridges, so they should last about 6.5x as long.

Having said that, I was on the Hunts website and they were about $48 dollars, not 90. The much larger capacity 220ml cartridges are about that much. Epson R1800 ink cartridges at B&H are about 12 dollars per cartridge, meaning there is a significant (but not monsterous) savings on the higher capacity inks.

Hope this helps!
James