The reason for the high price on the Wedding dress is simple.
It's called:
Greed; Gier; A ganancia; La codicia; Hebzucht; Godumas; Lacomia; 욕심; Girighet; Алчност; Ahnus; लालच; ketamakan; алчности; Ahneus; পছেন; Mohósága; Grådighet; Iz koristoqubqa; Açgözlülük; La cupidité; Ketamakan; 貪婪; Chamtivosť; Жадібність; L'avidità; Pohlep; Grådighed; Απληστία; 欲; Chciwość; Halacnimo; Tham lam; Greed.
It's not like they're making them out of special pixels.
Edit:
I wanted to amend this, so it's clear. This is by no means a criticism of Marilyn or any of the other designers.