If it's a gold coin, then it depends on the size and date. Re-ask the question specifying all the wording on both sides of the coin. If it's not gold, it has very little value -- these are often found in dealers' miscellaneous foreign bins for 25 cents or less.
How much is $5000 Estados Mexicanos dated 1938-1988 with an eagle holding a snake on the back worth in US money
What is a 1968 m printed copper mexcian nickel with a dot over it worth
Can usually find these in dealers' "25 cents or 5 for a dollar" boxes.
This coin is actually composed of a nickel ring surrounding a copper center. Value is just a few cents.
Better re-check the date on that coin. "Estados Unidos Mexicanos" did not appear on Mexican 20 Centavos coins until 1905. Before that, they said "Republica Mexicana". Most likely, you have a more current date on your coin. If your coin is silver, it likely has a value of a dollar or two. If it is one of the more recent bronze coins, you will find them in dealers' misc. foreign bins for 25 cents or less.
Need more information to identify the coin: Metal (or color), size, denomination, any other words on the coin. Then the grade needs to be determined before a value can be assigned. How much of the original design remains? (Often hard to determine. If you do not have an uncirculated example for comparison you do not know how many feathers should show on the eagle, etc).
It's an ordinary circulation coin worth 70 to 80 US cents. Note that "diez" means 10 in Spanish so "10 diez" is equivalent to saying "10 ten"
Nothing. These were coins made as copies for unknown reasons. Hence the word "COPIA". Copia in spanish means COPY. Look at the eagle on the flip side of the coin and you will see that it is facing to the right. On a real Mexican 20 Centavo piece, the eagle will be facing left. You've got yourself a fake coin.
I'm not sure, but it is actually an eagle, on a cactus, eating a snake. This was where the Aztecs built Tenochtitlan at Lake Texcoco, where they saw that exact eagle. Sorry I could not tell you what it was worth, but maybe the eagle thing cleared something up! This coin contains .6431 troy oz of silver, so its bullion value is currently higher than its numismatic value. My price guide suggests it is worth $6 in Brilliant Uncirculated condition, but the silver in it is worth about $11.
The easiest way to get the Eagle Dragon the game Dragon Story is to buy them for 400 gold in the market. It can be done by breeding them as well, but it is not a guarantee that it will be a Eagle Dragon born.
Due to a 1992 monetary reform in Mexico that made 1000 old Pesos equal to 1 New Peso the 1988 5000 Pesos is worth about .50 in the U.S. (1 Peso = ~10c U.S.). You might also try a library for a copy of the Standard Catalog of World Coins for pictures, values and lots more interesting info.