Without a date it is impossible to tell. These coins are usually not worth much more than their silver melt value. Their current silver melt value is $27.35 as of late February 2012.
They stopped making the Peace dollar in 1935.
Peace dollars were not made in 1833.
The fact that the eagles wings are spread tells me it's a Morgan dollar not a Peace dollar. Value is $16.00-$25.00 depending on condition.
$27.
The last Peace dollar was issued in 1935 so it can't be a 1942 Peace dollar. Look at the coin again and post new question.
The is no 1921S Peace dollar; Peace dollars were not produced in San Francisco ("S" mintmark) in 1921. If your 1921 dollar coin is a Peace dollar, it was produced in Philadelphia and has no mintmark; if it has an "S" mintmark, it is a Morgan dollar produced in San Francisco).
No such coin exist, the term is Peace Dollar and a date is needed.
Year: 1922D Mintage 15,063,000 Numismatic Value Range: $14 - $400$8.6870102468 is the total melt value for the 1921-1935 silver Peace dollar on January 16, 2009.ref:http://www.coinflation.com/coins/1921-1935-Silver-Peace-Dollar-Value.html
$50 see ebay
The first Peace dollars were struck in 1921.
First, it is not a Morgan dollar, it is a Peace dollar, second, it is worth around melt value to local dealers. That value is $23.50 .
Please check your coin again. 1921-dated Peace dollars were only struck at Philadelphia. If your coin has a "D" above the "DO" in "DOLLAR" and the eagle's wings are outstretched, you have a Morgan dollar rather than a Peace dollar. There's more information at the question "What is the value of a 1921 Morgan silver dollar?"