1984-P nickel errors include off-center strikes, double dies, filled mint marks, and strike-through errors, with off-center strikes often resulting from a collar malfunction. Other errors include laminated planchets and die breaks, which can be found on both circulated and uncirculated coins. The value of these errors varies based on the specific error type, condition, and rarity. Why are Error Coins Valuable? Error coins are minting mistakes that provide one-of-a-kind value. Whether you are a n