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
"audio as a hobby is dying, largely by its own hand. As far as the real world is concerned, high-end audio lost its credibility during the 1980s, when it flatly refused to submit to the kind of basic honesty controls (double-blind testing, for example) that had legitimized every other serious scientific endeavor since Pascal. [This refusal] is a source of endless derisive amusement among rational people and of perpetual embarrassment for me..”

-Gordon Holt
 Stereophile
Stringreen said: "...or expensive watches..."

That reminded me of when my brother-in-law bought a Rolex and was touting how great it was.  I think it was a one of the cheaper models and about couple grand.  Bottom line is that a watch is for timekeeping and my Seiko kept time just as well as his.  What he really got for his money, I guess, was a hunk of gold jewelry that said he was successful.  I'm thinking that people who, for example, buy a used pair of "Tara Labs Omega Gold" speaker cables for $7000.00 (http://www.tmraudio.com/product/xx-55) are like my brother-in-law.  They are more concerned about what "having" those cables says about them than any real improvement in speaker performance.  I have a set of pristine B&W Nautilus 803's.  I have to chuckle because this used pair of cables cost twice what my used speakers cost.
I like red wine but I tend to buy more moderately priced bottles because I can’t taste that much of a difference between mid-priced bottles ($10-$20) and higher priced bottles (+$25). There are bad low priced wines and bad high priced wines. But I would never say all high end wine is a rip off or call wine connoisseurs misguided as that would show my ignorance.

I am slowly upgrading my audio cables and like wine I do so based on MY senses, not others.