Before I head for TradeMe I thought I'd offer it up here first.
Phone is boxed and comes with all accessories (headphones still sealed in bag)
Comes with pink Sikai gel case that fits snugly around case but is minimal so adds next to nothing to thickness. Also will throw in a SanDisk 4GB microSD card too
Screen is perfect and has no scratches or marks whatsoever, has stock Gingerbread 2.3.5 and works like a dream.
I've got a Nexus S and now been given a Xperia Arc S for work so may as well let someone else use it as it's gathering dust in a drawer.
Looking on TM, they're going for $200+ but I'd be happy with $200ish and will courier for free NZ wide