LOL. HP and Gillete have the same marketing philosophy: sell the razors (printers) at cost or less, then make a pot of money selling the blades (ink). Just try to buy a fairly small replacement part for a HP printer; you’ll find it costs almost as much as the whole printer did.
Back in the day when I ran a small computer store I would sell these cheap dot-matrix printers that used the old fashioned ink spools for typewriters.
I would show the buyer how to re-ink the spools using a bottle of ink.
It was a cheap way to go...those old printers lasted a LONG time.