I strongly suspect in the NYC area, millions of immigrants from around the world, coming in with lots of money, paying any price for NYC property, and the sellers are happy, and migrating AWAY from the city also with lots of found money, and over paying in the suburbs.
Which in turn is driving out the established long term native residents. Who then move to cheap rural areas, and pay more than the natives can afford there. Strong hands to weak hands. Trump said he inherited a mess. It may get visible.