Seconding this. I have a discarded 4050TN from an old job and it's been working for 10 years printing thousands of pages per year, only rarely needing cheap and plentiful toner. I did have to replace the board with the microswitches to detect the size of the paper drawers, otherwise it would think each drawer had legal stock. All original rubber rollers, drum, etc. I don't have the #s handy but it feels like my cost for 3rd party toner is $100-$200/year, at most.