* Condition: The condition of a coin is one of the most important factors in determining its value. Coins that are in mint state (MS) or have been well-preserved will be worth more than coins that are worn or damaged.
* Variety: There are several different varieties of 1958 dimes, each with its own value. Some of the most valuable varieties include the 1958-D Proof dime, which is worth around $100 in MS condition, and the 1958-S Proof dime, which is worth around $75 in MS condition.
* Rarity: Some 1958 dimes are rarer than others, which can also affect their value. The rarest 1958 dime is the 1958-D Proof dime, with a mintage of just 1,500 coins.
If you have a 1958 dime, you can use a coin guide or consult with a coin dealer to determine its value.