I think Andy had a good question. Currencies can change from day to day. Sometimes the dollar wins, other days the Euro. We are never sure when to exchange dollars to Euros before we head to St. Barts. Sometimes we guess right, sometimes we don't. Either way hopefully life is a long term proposition. Turn 69 before our trip in April. Feel like I'm still a young man ( except I go to bed a lot earlier than I used to; but I still wake up at 4AM each morning as I did to get the first plane or ferry to Nantucket. The funniest thing is when I go to bed our dog walks up to his bed, and when I get up in the morning he follows me downstairs.you have to buy something andy,,,lol. its a grocery store. they will most likely give you change back in us dollars. that is what they do at maya's to go
I purchased water at Marche U using a $100 bill just so I could get my change back in euros. They had no problem doing it.
In my (dated) experience the banks don't want to know you unless you have an account there.
There's one currency exchange, Changes Caraïbes, upstairs, across the street from the new Goldfinger location. The old Goldfinger next to Le Select is now a Rolex store, and Goldfinger has moved to a new location, a block closer to the pay lot.
There used to be a second one, and there may still be, below the Sunset Hotel and near Petite Deauville ice cream, across from the ferry terminal. It was/is called Change Point.
I sometimes use my ATM card to get currency out of the machines at BNP Paribas. When I was there in November, the machine on the left gave out mostly €100 notes, and the one on the right gave out a better mix of denominations.
Choosing “small” provides a relatively reasonable mix - some 50’s.