When I read your comment I thought 'idiot, it's an 07 plate, it's not 7 years old!' Then I checked the ad and realised 2007 is seven years ago. That is alarming!
It wasn't as good as I remember it being... :P
£1200 is insane for an exhaust IMO. People also say it is the quietest aftermarket. Everybody has different tastes so arguing which is best is silly.