You could buy
You can buy one of the following:
Buy all billionaires
You can buy each US-dollar billionaire one of the following items:
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Acres of the Moon
Cost of an acre of the Sea of Tranquility, from the Lunar Registry for US$37.50 ($U753.80) from source -
Shopping list
You can buy all of the following:
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1 Duck island
Cost of a floating duck island, claimed as an expense by Conservative MP, Peter Viggers. for £1,645 ($U50,720) from wikipedia -
1 All humans replaced with replicas made from tap water
All humans replaced with replicas made from tap water for £636.50 ($U19,620) from hardcoded -
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500 Random number tables
"A Million Random Digits with 100,000 Normal Deviates" by Michael D. Rich for £62 ($U1,912) from waterstones -