I can't believe every player plays every house. So I think also now in the LCG era trading cards is important and healthy for every player's collection.
I offer Martell and Baratheon cards you will get them for the cards of the house you don't play. Exciting, isn't it?
Or you don't like Winter or Summer there are many reasons for cards never to get used by you... And because of plots like Valar Morghulis and bad bad kill effects you want a character twice without buying another chapter pack...
Take a look at what I have to offer: