I have managed to grab a few of the pins over the years. I also got the pair of Arc The Lad posters from Kelly Knight and a Dragon Force watch that I managed to find. The one thing that I have that I haven't seen for sale anywhere else is a black polo style shirt from Lunar Silver Star Story Complete for the PS1. IIRC you can see what the shirt looks like in the 'Making Of' video that comes with the game.