1900 is a common date for a Barber dime. For an accurate assessment of value the coin needs to be seen and graded. Most coins have seen heavy use and show a lot of wear. In general retail values for circulated coins (without a mintmark) are $3.00-$10.00. NOTE: Values are only for coins in collectible condition, coins that are bent, corroded, scratched, used as jewelry or have been cleaned are only valued for the silver.
10 cents, same as today
It's a common date, currently worth about $2.
A 1940 Mercury dime (not Liberty) is very common. If it shows any wear, the value is just for the silver, about $1.90.
It isn't a liberty dime, it is a Roosevelt dime, it isn't silver and only worth 10 cents.
The 1900 Barber dime is common, coins in average condition are $3.00-$8.00
10 cents, same as today
It's a common date, currently worth about $2.
A 1940 Mercury dime (not Liberty) is very common. If it shows any wear, the value is just for the silver, about $1.90.
It isn't a liberty dime, it is a Roosevelt dime, it isn't silver and only worth 10 cents.
The 1900 Barber dime is common, coins in average condition are $3.00-$8.00
The silver value of the coin is $1.25 as of today and that's likely what you could sell it for.
approx. $13.
A 1941 Winged Liberty head Dime - aka - Mercury Dime - in good condition (G4) is worth: $2; if the mint state is MS60, its value rises to: $8.00.
If in good condition it can be worth a few dollars. The dime was also silver.
A '44 Mercury dime is worth about $2.50.
Liberty Head dimes were issued from 1892 to 1916. Mercury dimes were issued from 1916 to 1945. They're not the same at all. See the Related Question for more.
A 1885 dime - aka - Seated Liberty Dime - in MS60 condition is worth: $200.