What is the value of an 1879 US silver eagle?

"Silver eagles" are modern bullion coins minted since 1986. They contain 1 oz of silver and are sold to investors and collectors. Their $1 denomination is artificial.

US $1 coins made up till 1935 aren't called "eagles" and they don't contain 1 oz of silver. They were ordinary circulation coins used in regular commerce. Your coin is called a Morgan dollar after its designer, George Morgan.

Please see the Related Question for values.