Good question. Seems unlikely that the prices are correct. If it is then someone has a huge incentive to import from other places. The most popular air-air heat pump in Norway with a SCOP above 5 is less than 2500 USD including installation and tax.
But, it's also a fact that the US is far behind when it comes to heat pumps and energy efficient homes. The general knowledge in the US about heat pumps is terrible.