I wouldnt pay too much attention to Parkers prices - what you need is someone to give you the value from the most recent editions of Glass's guide or CAP black book and take it from there. Far more accurate as they are used by the trade.
Ok, here are my submissions - the first one i took with a little point & shoot camera and the last two were taken by Adam, maybe people can help me decide which one to choose as my final submission?
Hello & Welcome
Nice looking Z you have there - good pics too.
With regards to the comments on your English - my experience of Scandinavia (Sweden mainly) is that the English spoken there is of a higher standard than the English spoken in the UK
I agree with Adam, even if its gunmetal it will still stand out a bit more in colour due to reflections, license plates, bumper reflectors etc. At the moment your eye is drawn to focus on the trails with the car as just part of the background.