@tali,
If we are keeping the thread serious then we'll stick with the most blinding obvious one.
"The total cost of producing the weapons in the first place and or maintaining them?"
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It might have been nice if you had been, a little clearer in the first place now would it not?
There is no such thing as financial worth for an object with no market so unless such countries as North Korea begin selling such weapons to others nuclear weapons have zero financial worth in the common meaning of the term.