I have a used Stillen Catback exhaust in very good condition for the Nissan 370Z. This was on my car for about 8 months, it was never driven in the winter time at all and has been off my car for several months now (I no longer have a 370Z).
This exhaust gives the car an amazing sound without being too loud. If you're not a fan of the VQ sound that was on the G35, this is probably not for you. The Stillen exhaust makes it deeper and more noticeable than stock.
The exhaust is a little dusty, but there are absolutely no dings or scratches on the exhaust. It is in mint condition.
These go for over $1200 not including shipping brand new on Stillen's website or from a reseller. Selling it for $880 obo.