If I go to the bank and ask to exchange a $100 bill for 100 of those gold Sacajawea dollar coins, do they have to accomodate me?” No. As far as the bank is. 1. Local bank or credit union. Your local bank or credit union branch may let you exchange coins for cash via coin-counting machines, letting you to. The exchange rate is around $65 for each American dollar and $68 for each euro​. • Argentine Coins range from one cent to two peso and are the following: •.