why do people feel the need to buy expensive cable


I have tried expensive cables and one's moderately priced. I would say there were some differences but I can't actually say the expensive cables were better. IMHO I believe a lot of people buy expensive cables because they don't actual trust their ears and are afraid of making a mistake. They figure the expensive cables are better for the fact they cost more. If you have a difference of opinion or share the same thoughts, I would like to hear about it.
taters
"Like i have stated before the price of copper is $5 a pound . So , it is not the price of the copper . What's left ? Only referring to copper cables as they are the most popular ."

Sorry. I thought you were speaking English. I should have known that a direct answer to a direct question wouldn't go over all that well. So what type of answer were you looking for, if not a direct one? If you can't come up with anything, we'll understand.
There are some basics when it comes to cable that can be measured. Then there's everything else that can't or is on the cutting edge of what can be known and demonstrated. I think the question is whether the price of admission to 'what if' is what should be debated.

Some answers in the affirmative can justify a price increase if it's labor intensive or if it requires some exotic metallurgy. Some answers that still remain in doubt should be looked at with a discerning eye (and ear).

Through all the years in audiophile history there have been some killer systems that used some old, tried and trued cables that did the job. Some basic tweaks along the way with coatings, purity, dielectrics, etc are probably all that were and are needed.

Interfaces between amp and speaker should be taken into consideration as well. Beyond that, I"m at a loss to say.

All the best,
Nonoise
The purchase of a luxury good may or may not make the purchaser happy, but it does make them happy about themselves. It's an affirmation of how they see themselves and their position in society. It's a testament to someone's economic status and discernment. Notice that the two most common rebuttals to those who question the wisdom of expensive cables are variations of "you can't afford it" and "your system or hearing isn't of high enough quality to judge".