While I don't have a specific answer the spread should not be much at all since the exchange rate is between 1 euro = 1.14USD to slightly a little more right now. I would be surprised if any place had it more than 1 euro = 1.20 USD.

What was current 6 months ago may well be outdated now since the exchange rate has narrowed and pretty much continues to narrow.

Scroll to "Restaurants" in the SXM-Info newsletter for what was reported a week ago.

While a lot of the supplies probably do come from the Dutch side, I doubt ALL do.