If you've ever come across an old stamp collection and wondered if it might be worth something, you're not alone. Collecting vintage stamps isn't just a charming pastime-it can also uncover hidden ...

Many collectors today wonder if postage stamps are good investments. While some rare and historical stamps have increased in value over the years, the market can be very unpredictable. Factors like ...

The universe of investment grade stamps for the United States is one of the largest in philately. My analysis focused on more than 3,000 listed items issued before 1950 and priced at $25 or more.