A rare stamp featuring a portrait of Barberton founder O.C. Barber will be sold at auction Thursday, Feb. 29 in New York City. The 3-cent relic from the 1860s was created to pay taxes on matches ...

Read more: Valuable Sports Cards That May Be Hiding ... For starters, another member of the Grill Issue stamps, known as the 3-cent George Washington B-Grill, sold for $1 million in 2008.

If you send a lot of letters, this would be a good time to stock up on Forever stamps. Why? The new rate to send first-class mail is expected to go up 3 cents, from 63 cents to 66, on July 9 ...