In the United States, it is a legal requirement that anyone selling fake or replica coins must have those coins stamped with the word "COPY", somewhere on the front or back of the coin (not on the edge). The intent is to make it obvious to anyone buying the coin, even those who aren't very familiar with coins in general or this coin series in particular, that this coin is not genuine.
Obviously, it's possible to buy fake coins without the COPY stamp. The Chinese fake-makers don't really care one way or the other, so long as people are buying their fakes. But if you want to sell the coins legally, they must have the stamp.
Note that having the stamp isn't good enough for
ebay;
ebay policy is to prohibit fake and replica coins entirely, even if they have the COPY stamp.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis