Morgan Silver

Price of a 1899 Morgan Silver Dollar?

Can anyone tell me the worth of a 1899 Morgan Silver Dollar? It's an "O" whatever that means, and is supposedly rated MS63. Just got ahold of it and I'm trying to learn more about collecting. Anyone know how much it's worth, and what makes it special or not? Thanks!

"A Guide Book of United States Coins" 44th Edition (The Red Book) values that coin at $45.00 in MS-63 condition. $23.00 at MS-60 condition. A scan of E-Bay will also give you an idea of it's worth. Otherwise a trip to a coin shop is in order.