Rare Date Coins: Coins from certain years or with limited mintages can become increasingly valuable as they become scarcer over time due to loss, damage, or removal from circulation.
Error Coins: Coins with minting errors, such as double strikes, off-center strikes, or planchet errors, can be highly sought after by collectors due to their uniqueness.
Variety Coins: Coins with distinct variations, such as different die varieties or mint marks, may attract collectors who specialize in specific varieties.
Historical Coins: Coins with significant historical importance, such as those from key moments in history or with ties to famous figures or events, often maintain or increase in value due to their historical significance.
Graded Coins: Coins that have been professionally graded and certified by reputable grading agencies can command higher prices due to their authenticated condition and grade.
Popular Series or Themes: Coins from popular series or themes, such as commemorative coins, thematic series, or coins featuring beloved characters or designs, may see increased demand from collectors.