Pricey is relative term. A dollar is now a dime relative to 1964. It's called Inflation.
Klipsch speaker are now less expensive than they were in 1964. CNC plastic and MDF, and China!
Electronics have come a long way in 60 years!!
Engineers should make a good living, yes?
If so the company they work for need to make a profit in order to exist in a competitive world,, in order to pay them and the people who manufacture their designs, yes?
DC300A's are obsolete designs many of generations ago. This is 2025, not 1964. A lot has happened, and all 60 year old Paul Klipsch creations are obsolete, except the Khorn, now replaced by Mark IV models. Soon to be replaced also.