The language "NOT FOR SALE IN US WATERS TO A US RESIDENT" must legally be added to listings for non-US Registered boats that are in US waters under a cruising permit and placed for sale by the Owner.
You can choose any number of yacht brokers to help you buy or sell a boat. But the vast majority of them are far from offshore yacht sailors. They are salespeople, pure and simple.
Antigua And Barbuda
Croatia (local Name: Hrvatska)