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 (฿1,137) from source
Shopping list
You can buy all of the following:
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600 Random number tables
"A Million Random Digits with 100,000 Normal Deviates" by Michael D. Rich for £62 (฿2,885) from waterstones