Jahwe

I'm looking for more information on this Darth Vader sculpture: link from Brickowl. The only information I have is what I can find on the link above. 2 things I would like to know is if would want to sell this, how much is it worth? For a normal lego set I can google / bricklink / ebay and easily find all the information I want but this statue is so limited edition that I don't find it anywhere. So any advice on how to determine a price for this is appreciated. Secondly, does anyone here have an idea what the contest was to win this? A friend of mine bought it from someone in a bigger lot of lego so we don't know what the contest was about and we're curious about the story behind it.

Getting my porsche next week I'm looking at what mods to apply. Your ultimate edition looks like the way to go and many thanks for providing all this material! Now, when building from scratch, what would the best approach? Are the groups in the LXF matchable with the building steps or should I just build it up as per the manual and the see what needs to be modified?