Greenish G2 Night Star?

[Nella]

I already had the additional hairpieces figured out the be Night Star's, but I think I have Night Star as well. 
Her body is a bit greenish-blue instead of really blue. I'll try to make pictures of her this weekend. The hairpieces (yellow) have a real blue end so they do belong to Night Star........ why is the body so strangely colored?

Therefore my question: is G2 Night Star prone to discoloration? And with respect to the value. What would the difference be between a discolored one and a 'blue' one?

[HoustonCollector72]

she is not a rare g2 and the changing mane /tail ponies are not very popular within the g2s but  if she is complete and faded then she will be around 7 -10 in my opinion and since you are in Europe where she is even more common then price could be lower .