Custom Inear Monitors are one of earphone lines.
There are many company occupying this sector.
Mainstream products come from UE, JH and Westone.
By the way, their price did not drop since the products were released, or drop a little.
Maybe this depends on technology and handcrafting costs.
If it comes to the first issue, the price should have been decreased now, because now it's many years from the day the first product was released. And in the free market with many contenders, the price should be applied with demand-supply laws.
If it comes to the another issue, it's okay that the price remains same.
By the way, is it possible that CIEM's price drop in these 1-2 years?
The most important thing I concern about buying a pair of custom monitor is that I'm anxious the price would drop.