Short answer: At least one dollar, but possibly much more.
There are several different types of US "silver dollars" -- more information is needed.
For Eisenhower dollars (1971 through 1978) the ones from circulation did not contain any silver even though people mistakenly call them silver dollars -- they're worth about $1.10 apiece.
As for Morgan and Peace dollars (1870's through 1930's), it could be anywhere from about $30 for a common date poor condition coin (silver value), to thousands of dollars for a nice rare date coin. More information is needed to give any kind of evaluation -- date, mintmark, condition.
Then there are the silver bullion dollar coins minted from 1986 to present. These coins were never put into circulation, although it's possible someone could accidentally spend one for face value. Like other coins, their collectible value depends on date and condition, although most of these are found in high Mint State or high Proof conditions.
Older dollar types will be worth significantly more, but exact details of the coin would be necessary for an evaluation.You need to post a new question with more information - the date, condition, and mint mark are the most important factors in determining a coin's value. Without that information it's not possible to provide any evaluation.
Not nearly enough information.
Post a new question with the coin's date and mint mark.
Simply put about $30, but it could be worth a lot more depending on date and condition. An average circulated Silver Dollar coin is worth about the silver content.
A real silver dollar has a $25.00 value just for the silver.
what is the current value of an 1878 silver dollar
Sorry no US silver dollar coins dated 1826
No US dollar coins dated 1975 were struck
No US silver dollars were made after 1935, look at the back of the coin for 'Half Dollar'.
The US never printed 100 dollar silver certificates with this date.
current silver troy ounce value
These coins contain no silver and are worth only face value.
Value is for the silver about $2.50
What is the value of an 1864 silver dollar.
There was no silver dollar in the US made in 1957. It might be a half dollar. These are usually worth about $10-15.
The first US Dollar coin was struck in 1794
They didn't mint 1920 US silver dollars.
Sorry, no US Silver Dollars dated 1809
No such coin was minted by the US mint.
The blue seal indicates your bill is a silver certificate, a form of paper money issued until the early 1960s. Please see the question "What is the value of a 1935 A US 1 dollar silver certificate?" for more information.
The first US silver dollar was made in 1794, check the coin again and post new question.
The US did not print any two dollar silver certificates after 1899.
A denomination is needed. Please see the questions "What is the value of a 1934 A US 5 dollar silver certificate?" and "... US 10 dollar ..." for more information.
As of Oct. 2012 the value of a 1881-S US dollar graded MS-63 is $65.
The only US dollar coin with a date of 1984 is a commemorative Olympic Coliseum silver dollar and has a retail value of $16.00.