Found a copper Mexican coin. One side says Estrados Unidos Mexicanos (United Mexican States, I get that), there is no year on the coin. Other side has the number 20 at the top and the word Copia at the bottom. Any idea the value?

The real coins had dates. There were "tokens" made without dates, they appear to be selling for about 2 USD on eBay.

Mr. Chuck, I have a coin similar to the one above without a date. Some of the coins I tried to mfind had a eagle on the right with a snake in it's mouth. The one I have is opposite. The eagle is oan the left with the snake in it's mouth. Can yuou help me ? Thanks have a blessed day. J.j.