Within half a year after the launch of PS5, the price of PS4 should not change much. After the price of 5 stabilizes, the price of 4 will drop slightly, but not much.
The new and old PS4 is not sold anymore. The PS4 SLIM version will likely be reduced to the range of $180-220, and the PS4 PRO version will be reduced to the price of $260-280.
