It's a hardball negotiating tactic for buying a used Ford Taurus.
For international diplomacy, all it does is sour public opinion of the party you're trying to negotiate with. With a looming election, ,candidates will want to project strength against the foreign would-be invader. And these negotiations involve reams of data, so we know full well that he does desperately need the Taurus.
Not only is the Taurus no longer for sale, but we're gonna' put a soup can muffler on it and sell it to your neighbour for half price.