Lots of good information and analysis above. One thing not mentioned is what are the actual street prices of the $$$ speakers? Leaving aside "industry accommodation" pricing, what do real consumers actually pay for a $50K or $100K speaker? I have no idea and I imagine it varies widely, but it would be interesting to know what the average discount is on these uber high-end products. The only speaker I bought new in the last 20 years was obtained at a very substantial discount from list. It was not in this price category but still, it didn't take any arm-twisting on my part.
Of course, the most basic answer to the OP's question is: "Price".
Of course, the most basic answer to the OP's question is: "Price".