You could buy
You can buy one of the following:
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Year of Wikipedia
Yearly expenditure of Wikimedia Foundation, 2007/8 for US$3,541 thousand (zł11,520 thousand) from wikipedia -
A grain of sand made of anti-hydrogen gas
A grain of sand made of anti-hydrogen gas for US$3,408 thousand (zł11,080 thousand)
Buy all billionaires
You can buy each US-dollar billionaire one of the following items:
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duck islands
Cost of a floating duck island, claimed as an expense by Conservative MP, Peter Viggers. for £1,645 (zł8,208) from wikipedia
Shopping list
You can buy all of the following:
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1 Year of Wikipedia
Yearly expenditure of Wikimedia Foundation, 2007/8 for US$3,541 thousand (zł11,520 thousand) from wikipedia -
7 thousand Carl Sagan's Cosmos DVDs
Inspirational and wide-appeal science series. Thirteen episodes, each one hour long. for £11.71 (zł58.43) from source