The grading process is exacting, and accounts for the tiniest imperfections.
If you have your Mercury Dime graded, you will get a better idea as to what the coin could be worth to dealers and collectors. If you have a Mercury Dime that appears to be in good condition and it bears a desirable date, you may wish to consider having it professionally graded by reputable company such as PCGS or NGC.
These coins can be had for as little as $1.50, but may also be valued upwards of $1500 for a single coin. The value of a Mercury Dime varies significantly depending on its year of mintage, mintmark and condition.