The Chinese are heavily into counterfeiting old coins and even counterfeit slabs. I was at a coin show over the weekend where a public announcement was made that counterfeit silver coins were being sold to unsuspecting dealers.

You can buy coins directly from the makers, and you can opt whether to have the word "COPY" on the coin (to comply with the U.S. law) or whether to have it omitted. These companies sell on eBay, so all collectors need to beware.