I have an HKS Hi-power catback exhaust that is in very good condition. There is some surface rust on the midpipe but nothing major. I just decided to go with something more subtle. However, this DOES NOT include any gaskets or hardware, as I had to reuse them on my new exhaust. $400 Shipped (+ 3% paypal if applicable).
I'm also currently at school in Boston, so won't be able to get them shipped out until after thanksgiving. It will also be cleaned up before shipping (it's mostly just covered in dirt/dust in the pics). Local pickup is also available for $50 less. The exhaust is at my mom's house in NJ, zip code 08812 right now.
Please email me at jnorell@mit.edu for the fastest response.