...and when the toner warning appears, stick a piece of electric tape over the sensor and keep going! I printed for literally years after the toner warning appeared with no decline in quality (I didn't print often, but still!).
Thanks, I was looking to get a cheap home laser printer. Seems you and everyone recommends them, so it's ordered. Pleasingly, at least on the website I bought it from, the OS compatibility is listed as "Linux, Windows, iOS, macOS", which suits me quite well.