In some cases it's heaper to throw away the printer when the cartridges go empty and buy another printer, than it is to buy more ink cartridges.

My fax went empty and it was $49 for a new black ink (Xerox, proprietary Epson carts) I found a new Brother fax for $69, that was a scanner, copier, fax and had a card reader built in. Does OCR and more.