Don't forget to throw in size.
Bigger speakers usually equate to more dollars. If Axiom were to make a 90lb speaker with 7" or larger drivers, i'm sure their average speaker cost would rise.

Oh waitaminute, they did make a 100lb speaker with a larger driver and it costs over 2k Cdn.



My personal favorite for over the top and pricey has to be the Nautilus:


"Those who preach the myths of audio are ignorant of truth."