I totally agree with this idea. Collecting skins is one of my favorite things to do in games, but I find it useless in guild wars because there is not enough space to have all skins and if I want my character to have a new look I will have to destroy the armor skin I’m currently wearing, that’s also the reason I don’t buy skins from the gem store (1 use only).
If an idea like this got implemented into the game Anet would make allot of money from the gem store with limited edition skins. I would surely buy them all and I know more people who would too.