Yes, I have the Republic of the Marshall Islands "First Men on the Moon" $5 Commemorative Coin
300000,0000,000
No silver. They are copper-nickel
"Currently Marshall Islands coins are valued at or below their face value when bought and sold in the US coin market. The basis for their currency is the US dollar. This was only based on the US dollar and is not redeemable in the US. The coins are rarely redeemable at face value even on the islands. These coins were intended for collectors, not for widespread use as currency." Source: http://coins.ha.com/common/questions.php sci
I have a republic of Liberia coin as well, and the certificate that came with it states it is copper-nickel.
If it's silver, then at least $30.00
In 1993 the Republic of Liberia issued a Nolan Ryan 10 dollar silver proof coin. The value of this coin is about $15.
it is actually the freedom tower silver dollar which is a one dollar coin minted under license of the Commonwealth of the Northern Mariana Islands (CNMI) in 2004. it is however not issued by the official us mint.
1984 Silver eagle from Sunshine Mine .999
Today 2/14/2011 I bought one on Ebay for $39.99.
An 1879 "Silver Dollar" is a Morgan dollar.
The book value is about 8 to 10 dollars in the Krause Standard Catalog of World Coins. The ten dollar version of the same coin has one once of silver so has the real value.