Try eBay.
A 1880-S Morgan Silver Dollar that is in a mint state of MS67 is worth: $ 450.00.
In MS60 Grade uncirculated, a 1880 S Morgan Silver Dollar is worth about $52. In MS65 Brilliant Uncirculated, it is worth over $330.
Currently a 1880 S Morgan silver dollar in MS65 uncirculated condition is worth $156.
1880 is a common date Morgan dollar, circulated examples are $17.00-$26.00 depending on grade.
If you mean a 1880 Carson City Morgan dollar? circulated examples run from $100.00-$300.00
Yes.
Currently as of April 2012 a 1880 Morgan silver dollar in MS63 uncirculated condition is worth around 63 dollars.
That depends on the denomination of the coin.
7-31-11>> Assuming the coin is circulated and has no mintmark, the 1880 Morgan dollar is very common. Values are $38.00 in the grade of VG-8
The 1880 Morgan is also very very common. A circulated example is $38.00 to $44.00 depending on the actual grade of the coin.
$27 to $1300 depending upon the condition of the coin.
Your coin is called a Morgan dollar. "American Eagle" coins are modern bullion pieces made since 1986 for collectors and investors; Morgan, Peace, and other standard-issue silver dollars were made for use in ordinary commerce. They were discontinued in 1935. Please see the question "What is the value of an 1880 US silver dollar?" for more information.