Near this price
You can buy one of the following:
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Duck island
Cost of a floating duck island, claimed as an expense by Conservative MP, Peter Viggers. for £1,645 (HK$19,590) from wikipedia
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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200 Years membership to the Free Software Foundation
Yearly Associate Membership to the Free Software Foundation for US$120 (HK$931.50) from source