Postcard pricing is affected by demand, condition, and rarity. Demand is probably the most important factor.

The following are commonly used grades used to describe the condition of postcards. Watch out for descriptions like "average" or "good considering its age" or "very good except for a small tear (or stain)." These terms usually mean the card is fair or worse, and the seller does not understand the importance of condition. Another term that is misused, especially in internet auctions, is "fine." This could mean anything from fair to excellent.

Mint(M): A perfect card just as it comes from the printing press. No marks, bends, or creases. No writing or postmarks. A clean and fresh card. Seldom seen.

Near Mint (NM): Almost Mint, but very slight aging or discoloration from being in an album for many years. Not as sharp, crisp, or fresh looking. Usually priced higher than a card in excellent condition.

Excellent (EX): Like mint in appearance with no bends or creases, or rounded or blunt corners. May be postally used or unused and with writing and postmark only on the address side. A clean, fresh card on the picture side. This is usually considered as the baseline for pricing.

Very Good (VG): Corners may be slightly blunt or rounded. Almost undetectable crease or bend that does not detract from overall appearance of the picture side. May be postally used or have writing on the address side. Most collectible cards are in this condition. Cards in "very good" condition should be priced about 20-25% less than cards in excellent condition.

Good (G): Corners may be noticeably blunt or rounded. Card may have noticeable but slight bends or creases. May be postally used or have writing on the address side. A small handwritten signature on the picture side may be acceptable to some collectors. Cards in this condition should be priced 40-50% less than cards in excellent condition.

Fair (F): Card is intact. Excess soil, stains, creases, writing, or cancellation may affect picture. Could be a scarce card that is difficult to find in any condition. Cards in this condition are not considered collectible unless they are rare. Some postcard collectors may buy cards in this condition if the price is minimal. May also be bought by someone who is just interested in the image.