A terrific online company to consider is APMEX. They're located in Oklahoma, but they deliever all across the US.
One of the biggest companies selling silver is Littleton Coin Company. Other large companies selling silver include APMEX, Bullion Direct, and Quality Silver Bullion.
Bullion is not a unit of measurement. The word bullion describes precious metals (such as gold or silver) in large quantities. This is usually in the form of ingots or coinage.
a large supply of bullion, or gold and silver.
Assuming you have a large coin with a picture of Miss Liberty walking and the sun in the background, you have a bullion coin sold for its silver content and not for spending. The dollar denomination is artificial. At the current price of silver it's worth about $17.
A large supply of bullion
A large supply of bullion
This a 1oz silver bullion coin. It is worth around $40 because of the silver content. It is worth the price of silver per ounce.
The companies Schredds and Antique Silver both have a large selection of Georgian antique silver that can be ordered online. Also, eBay has this item for sale as well.
Someone can purchase Monex silver from a number of companies such as Amazon. Amazon has a large selection of Monex silver and also offers free shipping on orders that are $25 or greater.
A 1926 silver dollar is not the same as an "eagle coin". So-called "eagle dollars" are modern bullion pieces sold for their silver content - the $1 denomination is artificial. Up till 1935 $1 coins were large and contained silver. The price of silver was controlled so they were only worth $1, and they were used in normal commerce. Please see the Related Question for more information.
the appalaichan coast
If you have a large coin that says "999 fine silver" on the back, it's a bullion coin worth about $18. If you have a small coin with a picture of the native guide Sacagawea on the front, it's not made of silver - it's manganese brass and is worth face value only.