Geezus!! I can't believe how much they've jumped in price in just over a year!! Cheapest I can find them is $630 each at Mopar Parts Canada online. A buddy says there must be a compressor that controls them....is that true?? Mine just starting bouncing wildly out of the blue, making me think it might be a broken compressor since the shocks didn't seem to slowly deteriorate like I've experienced with other vehicles. Any thoughts?? TIA