No simple answer, many US silver dollars are considered rare for different reasons, be more specific and post new question.
These coins are NOT rare and are worth face.
For the Peace dollar series 1935 is not a rare coin. The only rare Peace dollar is the 1922 high relief matte proof coins.
None of the bicentennial dollar coins struck for circulation are rare or even scarce and most dealers don't buy them. Only proof and uncirculated coins sold from the Mint have more than face value.
It is not rare, just expensive. But, you can get small silver coins for as little as $2.
Circulated coins are valued at $17.00-$36.00 depending on the grade it's not a rare Morgan mint state coins are $45.00-$60.00
nimrod
No US Dollar coins dated 1823 or any Silver Lady Head coins?
1920-1966 Canadian coins have the following value as of March 2 with SIlver prices at $34.69 per ounce. Dollar: $20.81, Half $10.40, Quarter $5.20 Dime: $2.08. These are all $80% silver. In 1967 and 1968 Most Canada coins went to 50% silver. After 1968, there is no silver content. This answer is from a silver perspective only. There are rare and collectible coins that have no silver.
That depends on which rare coin you have. Some rare coins are worth only 150 dollars in average circulated condition while others are worth thousands of dollars. To get a more specific answer include the date and denomination of your coin.
For 90% silver one dollar coins they have about 24 grams of silver.
The Morgan silver dollar is a collectors item and can be about $39
These coins are not rare. They're made of copper-nickel like dimes and quarters, rather than silver. Unless they are uncirculated or proof they are worth $1.