Which product holds the Guinness World Record for the most expensive item ever sold in a retail store?

The world of retail has seen some jaw-dropping price tags over the years, with luxury brands pushing the boundaries of consumer spending. But do you know which single item holds the official Guinness World Record for the highest price ever commanded in a retail environment? This isn't about auction houses or private sales - this record specifically recognizes the most expensive retail product available for direct purchase. Test your knowledge about extreme luxury retail and see if you can identify this record-breaking item!

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• The Graff Pink Diamond Watch ($55 million) at Graff Diamonds, London
• The History Supreme Yacht ($4.8 billion) at Stuart Hughes Luxury Store, UK
• The Cullinan Heritage Diamond Necklace ($200 million) at Cartier, Paris
• The 'L'Incomparable' Diamond Necklace ($55 million) at Mouawad, Geneva

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