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Yes, I have the Republic of the Marshall Islands "First Men on the Moon" $5 Commemorative Coin
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
Unfortunately, these privately minted Marshall Islands coins are essentially worthless. They are not silver, so they cannot even be sold for any metal value. You can't even redeem them at a bank in the Marshall Islands -- they won't honor them. At best, you might get a couple dollars as a novelty item. Wish I had better news for you,
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.
An 1879 "Silver Dollar" is a Morgan dollar.
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.
Today 2/14/2011 I bought one on Ebay for $39.99.
1984 Silver eagle from Sunshine Mine .999