An ultra-rare U.S. postage ... stamp in 2005. Auction house Director Charles Shreve called Gross' collection, "without question, the most significant and most valuable collection of United States ...

The stamp, seen here with Siegel Auctions President Scott Trepel, once famously featured in an episode of the Simpsons A rare US postage stamp ... The 76-year-old told the Washington Post that ...

Folks in Canada, you might want to check those boxes in the attic extra carefully, before donating your grandpa's old junk. This 1904 British stamp is extremely rare because nearly all of the 19 ...