Your coin collection could lose value if you're not careful. Avoid these five mistakes to keep your coins in top shape.
Don’t Clean Your Coin This is the #1 mistake collectors make. Cleaning coins — even with mild soap or polish — can scratch the surface and destroy the natural patina. Once cleaned, most coins lose significant value.
Don’t Touch the Coin’s Face with Bare Hand Oils and dirt from your fingers can leave permanent marks. Always handle coins by the edges and consider wearing cotton gloves, especially for high-value or proof coins.
Don’t Store Coins in PVC Plastic PVC coin flips or plastic holders may seem convenient, but they release chemicals over time that can cause green slime-like residue and corrosion. Always use acid-free, inert holders.
Don’t Expose Coins to Humidity or Extreme Temperature Moisture leads to oxidation, and rapid temperature shifts can damage coin surfaces. Store your collection in a cool, dry, and stable environment.
Don’t Overprice or Mislabel When Selling If you misrepresent a coin or ask too much, buyers won’t trust you — and your coin might get flagged or ignored. Use accurate grading and fair pricing.
Protecting your coins is easier than you think. Just steer clear of these habits, and your collection will stay valuable and admired.