You know, it would probably be possible to benefit from your organs' value while you're alive. Sign a contract to agree to be organ-harvested after your death, and get a stipend for the average estimated value of your cadaver, today! Free money, from your perspective. You could get more if you contractually agreed not to smoke or take certain dangerous jobs.

That's a brilliant idea and it is a travesty that it isn't in place now. (The whole "moral hazard" thing would need to be solved but there are ways to solve it.)