$50-$65
A 1776-1976 no proof quarter dollar worth in 2012
Currently as of April 2012 a 1880 Morgan silver dollar in MS63 uncirculated condition is worth around 63 dollars.
1922 is one of the most common dates for silver dollars. As of November 2012, it's worth around $26.
No such coin as a "Liberty Silver Dollar" exists. All U.S. one dollar coins From 1794 to 2012 have the word LIBERTY on them. Please post a new question with the date on the coin.
If the silver content is that pure, then it's some kind of silver bullion round rather than a coin used for spending. As of 18 July 2012, silver is worth $27.18 per ounce.
The 2012 American Silver Eagles coins are one ounce of pure silver.
That's not really a $1 coin, but rather a 1 ounce silver bullion round. At current silver prices (as of 28 September 2012), it's worth $34.50.
1922 is the most common date for Peace dollars so the value is mainly for the silver content. At present it's worth about $21. The 1923 is nearly as common, maybe worth a dollar more.
There is no one answer to this question, as value depends on factors such as the date, mint mark, and condition. The short version is any circulated 1970s Eisenhower dollar is still worth one dollar. Any Peace or Morgan silver dollars (1935 and earlier) are worth at least $22 (as of June 2012) for their silver content. For a more specific answer, come back and ask a more detailed question.
Billy 'Silver Dollar' Baxter died on 2012-01-20.
If I knew what the silver price would do next year I'd be a very rich man. No one knows what the silver price will be next year, at present it is worth a bit more than $12 for the silver.