2006 Cummins ISX 450 CM870 jake rocker arms

What did you pay for new jake brake rocker arms? I was quoted $283.00 for a bare rocker arm.

I am having no luck finding prices or more information online, so I'd like to see what you paid for them as my mid and high jakes don't work at all only low setting works. This is in a 2007 Pete 387.

I have not yet confirmed if its the rocker arm is worn out and leaking or if it's the solenoid. I took it to a shop and asked them to open the cover and run the engine, manually activate the jakes to see if its leaking or not. But they ended up saying that it was a bad o-ring on my intake clamp and that it should work now. I drove off and still do not see any difference when I change the jake levels.