I am going to say it like this...
-The Sebenza is not the first high end folder one buys. Usually they buy Kershaw, Spyderco, Benchmade, Buck, Microtech, etc. while wondering how people can pay so much for a relatively plain looking knife. Only after handing it do they purchase the knife, as nothing else really compares.
-The Sebenza is a knife that is liked more with time, and not less as unlike other knives on the market, this knife retains its tolerances even with heavy usage.
-The Sebenza is usually the last production folder one buys, and is often the knife that goes in your pocket, and not in your case.
Why do I spend $200 on a pair of Red Wing boots? Or $400 on a Dewalt drill? Or $200 on a Surefire? Am I crazy? Well yes, but that is besides the point. Sure, you can get a pair of Payless boots for $20, a cheap drill for $15, and a Rayovac flashlight for less than $1. Heck, at Walmart you can get a pocket knife for ninety six cents, tax included! So why spend oodles of money more? In the end, it is a balance of things. The first is obviously the pride in ownership. Other people will see what you have, but that isn't why I personally buy high end stuff. I buy because I know I have the tools which will serve me best, which is personal confidence in my goods and the ability to get the jobs at hand done. The other is obviously quality. Many people simply like to have the best, or at least better.
In order to reckon the Sebenza, one has to see it in person, and carry it for a bit.