expensive paper

(Sotheby's)

World’s Most Valuable Stamp Sells For A Record $9.5 Million

If you’re like most people, the most expensive stamp you have in your possession is probably valued at around, oh, whatever the current price for postage is. High five! But among serious stamp collectors it’s a different story — and the world’s most valuable stamp of all stamps just raked in a pretty penny at auction. [More]