I think if you moved your thread to the colored stones forum, you may find it more helpful. There are so many amazingly knowledgeable people over there. However, I think that fancy purplish pink will be discounted slightly, but there are so many other considerations that need to be taken into account, such as the colors distribution etc.
I hope Kenny sees your thread and is able to respond. He collects fancy colored diamonds and often answers threads here in RT. I think that you would find him very helpful.
+1.
Two stones with identical GIA reports can vary a great deal in value depending on how "good" the color looks and how "good" the cut is whether they both be purple, or purplish pink or one of each.
I'm sorry, but his makes price comparisons of FCDs nearly impossible.
Buy from a vendor with a good return policy, since it is very difficult to capture the true color, whatever that is, of an FCD in a picture.
IMHO, based on 20 purchases I've made, www.fancydiamonds.net does a good job of capturing the overall accurate color of their FCDs in their photography.