The following are some factors that can affect the value of a 1964 Eisenhower silver dollar:
* Condition: The condition of a coin is one of the most important factors in determining its value. A coin that is in uncirculated condition is worth more than a coin that is in circulated condition.
* Mint mark: The mint mark on a coin indicates where it was minted. Coins that were minted at the Philadelphia Mint have no mint mark, while coins that were minted at the Denver Mint have a "D" mint mark. Coins that were minted at the San Francisco Mint have an "S" mint mark. Coins with certain mint marks can be more valuable than coins with other mint marks.
* Rarity: Some 1964 Eisenhower silver dollars are rarer than others. For example, the 1964-D Eisenhower silver dollar is rarer than the 1964-P Eisenhower silver dollar. Rarer coins are often worth more than common coins.
If you are interested in selling a 1964 Eisenhower silver dollar, it is important to have it appraised by a professional coin dealer. A coin dealer will be able to determine the coin's condition, mint mark, and rarity, and give you an accurate estimate of its value.