I owned SC54HHD for nearly two years, and it was a great car. I put over 20,000 trouble free miles on her.
I think the rear bumper was replaced before I bought the car, when I sold it, it drove great with no issues.
The drivers bolster is worn, and leather is pretty poor, there is a small crack on one of the sideskirts at on the OSR door if I remember correctly. Car was a great driver when I sold it last November for ?2200.
I had spent a fair bit of money keeping it serviced, new tyres all round at 45k miles, I regret selling it to be honest, but the 350z was an itch I had to scratch. :P
I certainly am not to blame for the sticker on the windscreen, gear knob, or exhaust.
Any questions, ask.
cheers