Sometimes, greed on the part of the seller and way too much money in the hands of the buyer is the very definition of supply and demand. And you don't have to get anywhere close to a $65,000 subwoofer for that definition to apply.
Tim
"The Lord giveth increase, but man devised credit.
Mass delusions are not rare. They salt the human story.
The hallucinatory types are well known; so also is the
sudden variation called mania, generally localized, like
the tulip mania in Holland many years ago or the common-
stock mania of a recent time in Wall Street. But a
delusion affecting the mentality of the entire world at one
time was hitherto unknown. All our experience with it is
original.
This is a delusion about credit. And whereas from the
nature of credit it is to be expected that a certain line will
divide the view between creditor and debtor, the irrational
fact in this case is that for more than ten years
debtors and creditors together have pursued the same deceptions.
In many ways, as will appear, the folly of the
lender has exceeded the extravagance of the borrower"
http://mises.org/books/bubbleworld.pdf
The more things change,the more things remain the same. There is nothing new under the sun.