If hes 80 he will be on a pension so...cigs if he smokes....whiskey if he likes a tiple.....hamper if he likes food.These things are dear if on a limited budget so they will come in handy.If hes well to do well.....a book token ect would be more in his line and would not be too expensive for you.Hope this helps.g.
Sorry to make light of such a serious issue, but not knowing this person it is a bit difficult to decide. My father turned 80 last year, and all he wanted was to get a bit younger. Unfortunately I could not help there.