Florida, like all 50 states, is an integral part of the United States’ sovereign territory. The U.S. Constitution does not provide a mechanism for selling a state to a foreign power, and such an action would violate fundamental principles of national sovereignty, territorial integrity, and the rights of the state’s residents.
The last major territorial purchase by the U.S. was the Alaska Purchase (1867). Since then, the nation’s borders have been fixed by treaty, war, and admission of new states—not by selling existing ones.
Florida is not for sale. The idea is a geopolitical impossibility under current legal, political, and moral frameworks.