The true value of money received over time as compared with a lump sum today. There was a radio station in Cincinnati that held a “$1 million contest” – the winner got $1 a year for a million years. Even with this some people thought this was a lot of money. I wonder if the winner tried to cash in the stream of payments.
Another sleeper here is the set of post-closing problems that can arise – disappointed contingent beneficiaries, for example. People should get disinterested advice from some knowledgeable person, but that’s really not what happens very often.