No mintmark the redbook says a price of 3,100. Take that as a high estimate though. I would suggest purchasing a redbook if you get a chance, you will be able to answer these questions and learn quite a bit about each type of coin.
Probably some where between $100 and $2700 depending on which die pair and numerous other conditions. Without a picture, that is about as close as you can get.
Pic's will be needed from the grade. The value is $500 - $3500 on the collectors buy or grade. once again :dead-horse: