The date and word "copy" strongly suggest your coin has very little intrinsic value, and no value as a collectible. The only exception would be if it contained any silver, which should be indicated somewhere in the design - e.g. "1/2 oz 999 silver" or similar wording.
To explain:
The value of an uncirculated 1999 Silver American Eagle Littleton coin fluctuates based on the market for silver. However, a coin can be expected to have a value of about $40.
A 1 pound Silver Eagle is worth about $200.
As of today the value is about $17.00 it's a bullion coin and the value is just for the silver. FYI it's called a Silver Eagle or American Silver Eagle coin
It's a 2000 one-ounce Silver Eagle bullion coin and as of today is about $18.00
Value is about $18.00
The current spot price of silver is $31.71 per ounce, that's the value of this coin.
The approximate value of your coin according to Numismatic News Coin Market Monthly Price Guide for March 2007: 1990 Silver Eagle = $18.00
The American Silver Eagle is a coin worth one dollar. It is an official bullion coin, meaning it is stored for its value and not traded in regular commerce. The coin is 99.9% silver, with an image of Walking Liberty on one face and the titular eagle on the other.
$12,000
From your description the coin is a Americain Silver Eagle that is made from one ounce of 99.9% pure silver, value as of today is about $19.00
These copy's of the 1933 Double Eagle have no numismatic collectible value, most sell for $5.00 or less at coin shows.
The value of a Silver Eagle coins is determined by the spot price of silver which right now is $29.23 which would be what your coin is worth, with perhaps another dollar added depending on condition for the coin itself.