Eisenhower Dollars
 
Eisenhower Dollars were created to honor both President Dwight D. Eisenhower (who had recently died) and the 1969 moon landing of Apollo XI. 
 
The Eisenhower Dollar was minted at Philadelphia (No mint mark), Denver (D) and San Francisco (S).  The San Francisco mint produced the 40% Silver coins and the other two mints produced the clad composition coins.
 
The introduction of the 1971 Eisenhower Dollar was the first Silver Dollar produced by the U.S. Mint since 1964.
 
The Silver Eisenhower Dollar is approximately 40% Silver, containing 22.68 grams of Pure Silver.
 
12 Eisenhower Dollars

12 Eisenhower Dollars

Price: $12.50
1976 Eisenhower Dollar CN Clad

1976 Eisenhower Dollar CN Clad

Buy It Now: $15.99
1971 Nice Uncirculated Eisenhower Dollar

1971 Nice Uncirculated  Eisenhower Dollar

Price: $1.99
Buy It Now: $3.99
The highest mintage year of the Eisenhower Dollar was the Bicentennial version (1776-1996) with 117.3 million at the Philadelphia Mint (no Mint mark), the second highest year was the Bicentennial version struck at the Denver Mint (103.2 million).
 
The lowest mintage of the circulated Clad Eisenhower Dollar was 1.77 million in 1973.
 
The highest mintage of the circulated Silver Eisenhower Dollar  was 6.8 million for the 1971-S ("eagle landing" reverse) and the lowest mintage (40% silver) was 1.8 million for the 1973-S (also "eagle landing" reverse).
 
The highest mintage of the Uncirculated Proof Silver Eisenhower Dollar  was 6.99 million for the 1976-1976-S (Bicentennial) and the lowest mintage Uncirculated Proof Silver Eisenhower Dollar  was 1.01 million for the 1973-S. 
 
There were also only four (yes only 4) Bicentennial Silver Proof Eisenhower Dollars struck (no mint mark) for date 1776-1976.  What are the chances we will own one of these.
 
The auctions above are a good place to start looking.