For the amount I print, I will never have to replace the fuser in a lifetime probably. The toner I can get it cheap enough on Amazon, and I don't care if isn't original because it works just fine. I chose on purpose a printer that allows you to install third party toner without complaining.

I 5 years that I want to a laser printer I spent 100$ for the printer itself, and 20$ for 2 toner from Amazon, and I'm on the second one and it's still half full.