"the demand for rare, classic anything rises in proportion to the supply of disposable financial resources in the hands of the ego-driven..."

You left out "Demand". Supply & Demand are what sets prices. There are many items in very short supply for which there is also no demand. These items can sometimes be had for the asking.

Even a person with an unlimited financial resource is not going to buy something they either don't want themselves or see no market for making a profit on it.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra