personally I wouldn't buy them, because I would rather decide for myself what I want to donate to and how much (if I can even afford it)
try doing something that would appeal to your local scene. a local company here did a run of snowboards with Mt. seymour graphics for instance. there's also a brand that only one particular crew uses.
since you probably won't be shipping them overseas (at first!)
and good luck, I can say I love riding my locally-made snowboard better than any other board,especially since I helped make it and such