accepting 5000/0 is not rational btw. why would you care more about the greedy unknown person taking all the money than the unknown person offering it?
Formally, this assumes that first you try to maximize your own payoff, and that being equal, you try to maximize global utility.
It can be argued that the "unknown person offering" the money has signaled a lower preference for keeping it than the "greedy unknown person" taking it.
This is a minor point, though, and somewhat besides the question. Just got curious about whether the folks that would take one cent would go all the way to accepting nothing at all.
It really depends where the money is coming from. If it's wealth that's just created (a $5000 car drops out of the sky) from thin air, it makes sense to create it (unless you sold used cars or something silly where you would personally be hurt). If it was transfered from one random person to another, and the person transferring it was voluntarily giving it up, then it doesn't matter either way which way you act.