Buying money to make money - Captain's Log, Supplemental — LiveJournal
Buying money to make money|
When reading credit card fine print I seem to recall special transaction fees for cash-like purchases. I suggest checking with your credit card company to see if that applies to you.
According to what I've read in random places on the Internet, it doesn't apply in this case. The U.S. Mint usually sells coins that are more like collector's items, so credit card companies see their transactions as purchase-like and not cash-like. I also have confidence that I can dispute anything weird that happens with the credit card company.