Hair colour for REALLY stubborn grays. The hair at my temples just won't accept colour so I am permanently two-toned! If proven to work I would happily purchase - for ever.
Old age thins the skin, so any decent hand cream or, OK, I admit it, face cream/moisturiser would be great, too.
Any product that helps those aging - problems with arthritis, mobility, etc., would be great. Even robots!
Although becoming old and decrepit, we are still human 'beans' with money to spend and do not need pensioning off in a quiet corner!!