Maybe im wrong but the fact that there are only a very limited number of these around surly makes them more appealable to some people.
I bought mine 2 weeks ago and after I put my deposit down the dealer got offered the asking price twice by 2 other people and then had 2 offers for 400 and 500 over the asking price.
I just bought a yellow is200 after wanting one for ages. It's a truly beautiful car and limited to just 50... I've only seen 3 others for sale, ranging from 4-6 k.
Colour is personal preference but I personally believe my car is the mutts nuts!