1: Error coins can be valuable due to their unique characteristics.

2: Coins with minting mistakes are sought after by collectors.

3: Varieties like doubled dies or off-center strikes are highly prized.

4: Factors like rarity and condition determine a coin's worth.

5: Consulting with experts can help determine a coin's value.

6: Researching recent sales can give an idea of market value.

7: Authenticating error coins is crucial for accurate valuation.

8: Investing in error coins can be lucrative for collectors.

9: Error coins add excitement and intrigue to any collection.