Well it is a bit sticky, addressing your request. We are in St. Maarten on a US Flagged boat on the Dutch Side.

If you bought a boat here, a US citizen could sail it to the USVI or Puerto Rico if the boat has a US or Canadian Flag. But that person could not return to St. Maarten. An EU person could sail an EU Flagged boat out of SXM to any French Island but could not return to SXM either.

No foreign flights are allowed into Princess Juliana airport. However, the French airport allows restricted flights to and from Guadeloupe and Martinique. But you need connections for those flights.

Right now you can fly into St. Thomas or Puerto Rico, buy a boat and sit on the US Flagged boat in those two areas, if you want to do that.

So no, you cannot fly into SXM and buy your boat. Florida, Puerto Rico or the USVI are your only warm choices to buy your boat and be able to sail on your boat. Oh, the BVI's are strickly off limits as well.

Good luck!