I’m at five years for ours. We used the included ‘teaser’ toner cartridge for almost three years. After the first year, it warned us the toner was low. We laughed and turned the warning off and it just continued to provide toner for nearly another two years.

We now have an “extra large” toner cartridge. Like owning a parrot, my wife and I expect it’ll outlast both of us and our children or grandchildren will get stuck with it. We’re both 35.