Silver dollar was first authorized in 1792. It has many versions.

Flowing Hair Silver Dollar (1794 – 1795)
 

 

Draped Bust Silver Dollar (1795 – 1804)
 

 

1804 Dollar

Gobrecht Dollar Silver Dollar ( 1836 – 1839)
 

 

Liberty Seated (No Motto) Silver Dollar (1840 – 1865)
 

 

Liberty Seated (With Motto) (1866 – 1873)
 

 

Trade Dollar (1873 – 1885)
 

 

Morgan Silver Dollar (1878 – 1921)
 

 

Peace Silver Dollar (1921 – 1935)
 

 

Eisenhower Silver Dollar (1973 – 1978): Eagle Reverse (1971 – 1974), Bicentennial Coinage Dated 1776 – 1976, Eagle Reverse Resumed (1977 – 1978)
 

 

Susan B. Anthony Silver Dollar (1979 – 1999)
 

 

Sacagawea Silver Dollar (2000 to date)
 

 

The following lists the typical coin value you would expect:
 

	F-12	VF-20	XF-40	MS-60	MS-63	MS-65
1878 Morgan Silver Dollar	130	135	155	250	450	2500
1891 Morgan Silver Dollar	120	150	200	370	800	4600
1893 Morgan Silver Dollar	4,500	6,500	9,500	110,000	170,000	620,000
1928 Peace Dollar	500	450	475	600	1,000	5,000
1973 Eisenhower Dollar	15	20	25	35	50	55

 
Here are some American Eagle Silver bullion for sale on eBay.