I want to know what makes a piticular Pastel line worth more $$?

The only Line of Pastel I really know of off hand is NERD. so what makes the NERD Line Pastels worth so much, and so popular?

I saw one for sale that was an 06 male up for $800 and it was a NERD line pastel.

at first I was thinking it must be rare but I see adults and babies from this line up for sale all the time. most sell with in days.

last question and I will leave you all alone...

What is a Lemon Pastel? I see alot of thoughs too.