Most valuable stamp lands $850,000 at auction

The world's most valuable stamp was sold at a record $850,000 to an anonymous collector at an auction in Manhattan this weekend. The seller, Irwin R. Weinberg of Wilkes-Barre, Pa., paid $280,000 for the stamp 10 years ago, with the idea of protecting himself against an unstable economy, he said.

The one-cent stamp, issued in 1856 in Georgetown, Guyana -- then Demerara, British Guiana -- was first sold by a British boy for a shilling.

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