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"A one-cent stamp won't even get your letter out of the post office\u2014but this is no ordinary penny issue. Dating from 1856, the British Guiana set its fourth auction record last night, selling for a hammer price of $7.9 million (excluding buyer's premium). The legendary stamp has passed through some of history's most intriguing collections. Most recently, the relic belonged to John E. du Pont, the late heir to the du Pont family fortune who was famously convicted of murdering an Olympic wrestler. The octagonal magenta stamp is now being heralded by auction experts as the most valuable item in the world by weight and size.\n\nSold at Sotheby's, \"The British Guiana\" (New York, June 17)."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.architecturaldigest.com/story/british-guiana-stamp-auction>