You have a few common Mexican, Costa Rican and Italian coins which are worth a few cents each to the right buyer, and some Chinese coins that are probably fake.
In the low possibility of the Chinese coins being authentic, 30-40 bucks a coin, but those coins are definitely fake.
If the Chinese coins are fakes they will have a ferrous core with a thin silver wash or cladding. If you put a magnet on them and it sticks, they are definately fake.
Those Chinese coins are fake, no doubt. They got some guys selling those at every flea market I go to, I've even seen them together like that. Just stick a magnet to them and you'll see