If you believe that stamp collecting is merely a hobby for kids and retirees, think again.
The American Philatelic Society (APS) in Bellefonte, Penn., has over 33,000 members. Stamps trade actively, as well.
Scott Trepel (left), president of Robert A. Siegel Auction Galleries Inc. in New York, reports that since 1930 his firm has run 1,037 auctions of stamps and covers; the auctions' dollar volume reached $35 million in 2012. (Covers are postage stamps on a cover, postal card or stamped envelope.)
Siegel has handled some noteworthy transactions. "We sold a plate block of the famous Inverted Jenny stamp for about $3 million," says Trepel. (The Inverted Jenny features an upside down airplane and is a famous stamp-misprint.) "That was a few years ago and sometime after that we sold a single for about $900,000."
The plate block-buyer was PIMCO's Bill Gross, who traded the Jennys for a single stamp needed to complete his collection.
As of November 2005, Gross became only the third person in history to form a complete collection of 19th Century United States postage stamps, according to Wikipedia.
Gross is a world-class collector and supporter of stamp collecting. The William H. Gross Stamp Gallery, part of the Smithsonian National Postal Museum, is scheduled to open in 2013 and will be the world's largest gallery dedicated to philately.
What's the Motivation?
Collecting decorative art can provide ego-satisfaction for owners who like to display their pieces, but stamp collecting's smaller scale makes it a more intimate activity.
For some collectors, the items are a tangible link to the past. Trepel cites an example of an old envelope that was in a mail sack carried by a Pony Express rider who was captured by Indians in 1860; several years later the mail sack turned up and the mail was delivered.
"Everyone who loves history, everyone who feels some connection to the past through an object can get excited about that," he says. "Other people collect stamps because it is a source of satisfaction to be able to complete a set or a page or a country or an album."