If I wanted the bird, and I could afford it, I would take him. Eventually someone will pay the "ransom," if you can, might as well be you. This sort of argument goes on all the time over at a snake board I frequent. Since you can't get the rest of humanity to boycott that store, just do what you can do for the bird you care about, if you can manage to.
I realize that is an unpopular stance, and many would call it irresponsible, but the logic of the principle just doesn't hold water for me. I guess I just don't think the ransom/hostage comparison is a good analogy. Sometimes, the heart is right. However, don't do it if you really can't afford it - remember the bird will need medical care, a good cage, food, toys, etc.