Rebuilds on these things are about $175 based on what Performance Shock told me. Yeah I don't understand the high cost of rebuilds. You might as well buy new. In my case, I have really stiff springs and would also need a revalve. I'll be looking at $250 for a rebuild AND revalve. dayum.
You know, I thought the knobs controlled compression! Ah well.
I also read somewhere that according to Koni, as the shocks start to wear down, you need to stiffen the shock a bit to make up for the wear in the piston.