Try to handle your coins as little as possible. The condition of collectible coins impacts the value: dirty, scratched, moisture-damaged or otherwise imperfect coins can result from too much handling. If you simply have to handle your collectible coins, only touch the outer edges of the coin to minimize contact with your hands.

You should try to avoid cleaning your coins and if it has to be done, the process should be handled by a specialist. A coin's patina, gradually developed over a period of time, might increase the coin's desirability, whereas cleaning the coin could make it less valuable.

Even though most holders offer plenty of safeguards against fingerprints and dust, you want to be sure that your really rare nickels are protected from moisture as well. Packets that are stapled or taped do not provide the greatest protection; however, there are alternative protectors available that guard also against moisture. Never keep your collectible coins in a damp, dark, cool area such as the cellar; instead, choose somewhere dry and with a steady temperature.