People who buy this "bling" would also put a set of $15K tires on their car if they were actually produced.
Exactly why it is such a poor analogy, $15K tires for cars are not produced.
As cleeds noted, apparently no one wants $15,000 tires. The is how markets work. Items that have no value are not produced. Welcome to Business 101.
When using analogies, it is best to stick to items that are actually produced, when trying to compare to other items that are being produced (and sold).
Making an analogy comparing a real animal, say a horse, with a mythical animal, such as a unicorn, is simply an exercise in futility.
Speaking of animals, and products that actually DO exist. Perhaps you may want to compare cables to expensive pet gear.
http://incrediblethings.com/lists/14-ridiculously-expensive-pet-products/
Your $137K Nordost cables example seems rather frugal compared to a $1.8 million dollar dog collar.
Life.......It's all a matter of perspective.