Shaitan
der Besucher
We can probably get Banking for free. Babylon has it now and they are so far below us on the power scale that extorsion should not be a problem. Most of the other civs don't have it yet so we could most likely extort the Babs and then sell Banking to most of the others. Foreign Affairs supports a heavy campaign of extorsion against Babylon (our citizens are not too fond of the Babs).