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In such cases the old rule of caveat emptor especially prevails. The offbeat plunger can make a big splash if he is lucky; he can also quickly go under. Bankers and investment houses usually shy away from such unusual and high-risk opportunities, but potential investors seldom have trouble hearing about them. Word travels rapidly through accountants, special brokers, newspaper advertisements, relatives or neighbors who want to let someone in on a good thing—they hope.