Which product holds the Guinness World Record for the most expensive item ever sold through an online retail transaction?

The world of e-commerce has seen some truly extraordinary transactions over the years. From luxury items to rare collectibles, online retail platforms have facilitated sales that have shattered previous records. This trivia question focuses on a remarkable milestone in online retail history - can you identify which product holds the world record for the highest price ever paid in an online transaction? Test your knowledge of remarkable retail achievements!

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A superyacht named 'Giga Yacht History Supreme' ($4.5 billion)
The 'L'Homme au doigt' sculpture by Alberto Giacometti ($141.3 million)
The 'Gulfstream G650ER' private jet ($70 million)
The domain name 'CarInsurance.com' ($49.7 million)