This exhaust needs no introduction - quite possibly the best sounding E36 exhaust available (right up there with Eisenmann, Borla, etc.) Read about all the technology here:
http://www.uucmotorwerks.com/RSC36
My friend is considering replacing it with something a little more inconspicuous so he wants to gauge interest... Go figure. It's only been on for about half a year and the car never sees salt or snow, so it pretty much is in mint condition.
He'd like to get back $750 for it, considering it cost him well over $1000 new to get it here. From what I understand these are pretty hard to find used and rarely go on sale, so if you've been looking for one, here's your chance. The question is - anyone looking?