I’d be willing to sell the last year of my life, but no more than that (and if it weren’t for fine print item #1, I’d probably turn down the deal, because if I’m fated to die in a car accident at the age of forty, I’d DEFINITELY want that last year). But I don’t see any real downside to taking a painless and instant death at eighty-two over a long slow death at eighty-three.
I don’t think the money would actually give me extra time, since I like my job and plan to keep doing it for as long as possible, but it would definitely mean a more comfortable life with more travel and less anxiety.