Japanese Video Game Posters - Where from?

[Oh_Mutants]

Been browsing through the 'What do you have on your wall' thread on here and after becoming super envious of some peoples' lovely Japanese game posters (Importaku; i'm looking in your Zelda posters direction! ) i was wondering where the best places to get Jpn posters from would be?
I've tried ebay before but mostly guff on there, any pointers in the right direction appreciated

[sj33]

This isn't necessarily going to be Japanese poster, but I get all my game/anime posters from www.gkworld.com . It's mainly anime, but there is game in there.