They must have figured out that they had made a mistake in the pricing. I ordered one of them and got it two days ago, just went back to check and the price is now at $422. Anyway it was at Drivewire.com. #G27619714.
I'd entertain the idea of selling my system if anyone is interested. It is a little loud for me. I really just wanted something quiet, but couldn't pass up the price of the stainless system and also like the idea of increasing the pipe size from stock to 2 1/2 inches. It's a nice kit, but I'm 40 and really don't like the vroom vroom. Call me old, I guess.