Auctions are the most common way to buy investment quality stamps, so it is a good idea to understand the dynamics involved. Auction houses make it easy to bid without you being present in the room.

While investment quality stamps have a steady history of appreciation, their value at any one point in time is fairly well known. It is therefore important for someone buying stamps as an investment ...

Many of us who collected stamps as kids were drawn by their beauty and variety. But for real collectors, it's the rare stamp — the mistake — that gets the excitement and the money. At Robert Siegel ...

In June, New York’s Robert A. Siegel Auction Galleries will offer what it is billing as the most valuable U.S. postage stamp, an extraordinarily rare 1868 one-cent “Z-grill” stamp featuring Benjamin ...