Park Tool Replacement Brush Set for CM-5/5.2/5.3 RBS-5

After running your chain through the Cyclone hundreds of time, you will see the foam break down and the brushes loose their stiffness. Park Tool has made a replacement kit for when that happens.  It is really easy to switch out the old for the new set, but what gets to me is the price.  As a mountain biker, I am used to handing over cash for products that seem overpriced.  Buying this set seemed like an especially bad value.  You can get a whole cyclone for just about 2.25 the cost of this replacement kit.  At the end of the day, I like the way the cyclone works, so I'll keep buying.  I should probably just look on the bright site that I'm saving $13 and not wasting the blue plastic shell.