The first OLED monitor for the public was released almost 4-5 years ago, yet prices have remained stagnant for the past years. There has been no price evolution whatsoever. Every year, I consider getting one, but I change my mind when I see that prices have sometimes even increased in the meantime. It seems odd to me. I would expect an increase in production of these panels over such a period.
They are not expensive though. Right now the highly rated Alienware AW3423DWF 34” 3400x1440 QD-OLED can be bought for very similar to a comparable LCD.