How to Spot Value

Discovering which stamps hold value is part art and part science. Here’s how to sharpen your eye and spot valuable finds.

Key Features to Look For

A rare stamp doesn’t always equal value—demand plays a huge role. Research how many copies exist and if collectors are actively seeking it.

Stamp condition labels are used worldwide to describe the preservation and gum status of a stamp. Here's what they mean:

MNH (Mint Never Hinged): Perfect mint condition with original gum untouched. No hinge marks at all. Most valuable mint category.
MH (Mint Hinged): Mint condition but has been mounted with a hinge. Usually a light hinge mark on the back gum.
MLH (Mint Lightly Hinged): Similar to MH, but the hinge mark is barely visible — a better condition than regular MH.
MNG (Mint No Gum): Mint stamp but without any gum on the back (may be issued without gum or gum is removed).
Used: Postally cancelled stamp. Value varies greatly based on rarity, cancellation type, and overall preservation.
CTO (Cancelled to Order): Cancelled but never actually circulated. Usually has full gum but printed cancellation.
NG (No Gum): Stamps with no remaining gum and not necessarily mint.
HR (Hinge Remnant): A piece of the old hinge is still attached.
Thinned: The back paper is damaged, usually from hinge removal — reduces value significantly.

Knowing these distinctions is essential when buying, selling, or appraising stamps. Always inspect the back for clues!

A magnifying glass, watermark detector, and catalogues (like Scott or Stanley Gibbons) are your best friends when evaluating stamps.

Helpful Resources: