next general noob question:
how significant is it that (other than the Tina bar find) none of the money has ever turned up?
if cooper had survived and spent the money, would we expect some bank somewhere to have found one of the bills? I know the serial numbers were made public, and banks were told to look out for them. but, while I don't know exactly how this worked, I can't imagine it was that complete of a dragnet. i certainly doubt every teller in the country was checking every bill they handled. and even if they were in '71 and '72, there's no way they're still doing it (though, post 1995 or so, it becomes easier to imagine this being done electronically....?)
on the other hand, it was a large sum of money. so if cooper spent it, and then it got spent by others, and then spent by still others, you'd expect it disperse over time, for more people to handle the cooper money, and for the odds of someone catching a bill to go up.
so, again, what's the executive summary on arguments about this? I'll take a link to one if it already exists. though I'll also accept another one of George's good posts, if he doesn't mind doing the work!