if it were possible to trade years of your life for money (or something else you want), would you do it? naturally the healthiest years, say <30 would sell for the most; the demand would decrease as your age increased. what's 10 years off if it meant you were set for (the remainder of) your life?
just imagine you're 28 years old, on the streets, with no family or income, but are reasonably healthy. someone offers you a fully paid off house in a good suburb, for 5 years of your natural life. you'd instantly turn 33 if you accepted, but you'd own your own house. Is it worth it?
Many things are coming in my mind. Need some time to think on this and this is quite interesting to me.