I agreer with Erin. Nothing wrong with buying used. Just make sure there is no rust on the exhaust, and you should be good to go. I have a Borla Hush, and have been very happy with it. Stromung is very distinctive, and probably one of my favorite sounding exhausts. I've read good things about ScoobySport, but don't think I would be able to recognize it if I heard it. Good Luck