Stamp collecting could offer long-term gains for those willing to carefully research and focus on high-demand pieces, but it's important to approach it with the same caution as any other financial ...

The post office in Provincetown has found the Morrison stamps to be in high demand. "They're flying off the shelves, everyone is asking for them," Acting Provincetown Postmaster Wendy Palmeira ...

Factors like the stamp's condition, rarity and demand all play a role in its potential for appreciation. ... The market for rare, historically significant or high-demand stamps remains active.