Personally, I think it depends on the artist.
If it's some guy you listen to on Myspace, and he has a cd he made himself, just give the extra support and buy it.
Now, for mainstream bands like Fall Out Boy, it's different. They're already making enough, if not more than enough, money from stupid stores like Hot Topic, selling albums for 15-20 dollars. It's too much.
Also, what about the bands that don't exist anymore? I think it's fine in that case, because since they're no longer together, so pretty much all of the money ends up going to the music label.
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