ah, the eternal consumer vs. producer debate.
the car consumer will say "how can you charge tens of thousands of dollars for so much steel, plastic and rubber?", while the car producer says "considering the hundreds of millions i have sunk in this automobile's design, consider yourself lucky i don't charge more!"
and therein lies the rub. are the silicon tips expensive to produce on the aggregate? certainly. they are obviously a superior product, hence their popularity, hence my desire to track down another pair.
but those sunk costs - engineering, drawings, sourcing, patents, manufacturing, testing, etc - are spread out over tens or hundreds of thousands of units, bringing the individual cost down to pennies. your argument (look how much they cost to deisgn!) holds true only if you produce a small number of units.
but there are many other situations that come in to play like convenience, guaranteed quality, volume, etc that make buying directly from klipsch the logical choice. i'm just not in any of those situations.