Somebody with a lot of money loses an eye. They decide they don't want to go through the rest of life with just one eye. You happen to have the same blood type as this person... You are offered $10,000,000 for one of your eyes to be used as a transplant. (Whichever one of your eyes has better vision) Yes, that's 10 million dollars. Let's say USD for the sake of consistency. Would you do the deal? Assume you can't get a replacement eye of your own. I would not do this for any amount of money. Sure it's a lot but it's just not worth it to me.