Canon iP1800 Ink Cartridge - PIXMA iP1800 Ink from $11.99
Speedy Inks - Remanufactured Canon PG-30 Black CL-31 Color Set of 3 2 Black 1 Color for use in PIXMA iP1800, PIXMA MP470, PIXMA MP210, PIXMA MX310, PIXMA MX300, PIXMA iP2600, PIXMA
Canon PIXMA iP1800 Printer Black Ink Cartridge – Network Hardwares
NICE Canon PIXMA IP1800 Digital Photo Inkjet Printer New Open Box 13803078084 | eBay
How do I pull a pen out of a Canon Pixma iP1800 printer without its owner knowing? (details in my comment) : r/fixit