This. A thousand, nay, a million times this.
I use a second hand HP business-class laser (a 4350). It cost me about A$150 from an office refurb place. The generic cartridge costs about $60 shipped and lasts for 25k pages. I've had the machine for years and am only on the first replacement.
Sure it doesn't do colour, but for the 2 times a year when I need to do so I just go to the local library and print there.
Just say no to inkjets.