In the age of email, stamp-collecting may seem passe, but the hobby continues to be very lucrative.
A rare one-cent stamp from the 19th century has just sold for $9.5m in New York.
The sale set an auction record, making the tiny piece of paper the priciest object by weight and size in the world.
Al Jazeera's Kristen Saloomey reports from New York City.
Source: Al Jazeera