Look on the back of the coin to see if there's a small mint mark letter. It may be blank or there may be a CC.
Numismedia lists the following approximate retail values as of 04/2011:
No mint mark (Philadelphia):
Very worn condition - $13
Moderately worn - $17
Slightly worn - $21
Almost no wear - $83
Uncirculated - $144 to $3,710 depending on quality
"CC" mint mark (Carson City):
Very worn - $63
Moderately worn - $121
Slightly worn - $240
Almost no wear - $648
Uncirculated - $990 to $17,550
DISCLAIMER: The retail values quoted are the best available as of the date shown, but may vary significantly due to changes in the precious metals market. Also the wholesale (buying) price of a coin will be less than the selling (retail) price. A reputable coin dealer will be able to give a more accurate valuation based on inspection of the coin.
The value of a US dime marked "ten centavos" is zero, since it is a fake. A real US dime is marked "one dime," not "ten centavos."
The Liberty head design was used on over several different coins in 1878. Please post a new question with the coin's denomination, with the wording "What is the value of an 1878 US (coin denomination)?" e.g. What is the value of an 1878 US silver dollar? or What is the value of an 1878 US 10 dollar gold piece.
a 1917 us dime is called a mercury dime. its not that rare so it is worth about a dollar
Face value only.
The US didn't mint any nickels in 1878. Please check your coin again.
what is the value for an American 1909 silver dime
The value of a US dime marked "ten centavos" is zero, since it is a fake. A real US dime is marked "one dime," not "ten centavos."
The Liberty head design was used on over several different coins in 1878. Please post a new question with the coin's denomination, with the wording "What is the value of an 1878 US (coin denomination)?" e.g. What is the value of an 1878 US silver dollar? or What is the value of an 1878 US 10 dollar gold piece.
a 1917 us dime is called a mercury dime. its not that rare so it is worth about a dollar
A 1988 dime is worth 10 cents.
Face value only.
10 cents
10c
The US didn't mint any nickels in 1878. Please check your coin again.
what is the current value of an 1878 silver dollar
The US discontinued its half-dime denomination in 1873.
The 1965 dime is a Roosevelt dime. This dime does not carry a mint mark and there were 1,652, 140,000 of them minted in the U.S. They have a value of between 10 cents and 2 dollars.