printers are pretty much throw aways now adays,
that is to say that cartriges cost more than the printers themselves. You can pick up cheap lazer printers for about $50, and when it comes time to replace the cartridge, you are better off selling your machine without cartrige for about $10 or $15 and just buying a new printer again for about $50 instead of buying a new cartridge.
its fucked up, but that is the way it is.
Of course if you need functionality like color, faxing, scanning, etc then you will be looking at more than $50.... but it really depends what u need