Our toaster oven has lost its ding. I don’t know exactly how old it is – it’s definitely not the one we got as a wedding present, but I can’t remember when we replaced it. Possibly as long ago as the Portsmouth house, which makes this toaster oven around 12-14 years old. I think that’s a reasonable life expectancy. Of course, I say that as if the fact that it doesn’t ding when the timer is done means it doesn’t toast bread. It still works! It just doesn’t cheerfully alert me when it’s done anymore, so I have to pay more attention to avoid cold toast. Life is hard.