You could buy
You can buy one of the following:
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One cube of gold one meter in size
One cube of gold one meter in size for US$1,038 thousand (NZ$1,281 thousand) from hardcoded
Buy all billionaires
You can buy each US-dollar billionaire one of the following items:
Shopping list
You can buy all of the following:
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3 thousand Scientific calculators
Casio FX-85GT+ scientific calculator for £7.99 (NZ$15.12) from source