The most expensive speakers I have ever seen are the German Physiks Tiebreak - Aka Gaudi.
Priced at $250,000 USD, Im sure they would suffice for a small country to listen to music.
http://www.german-physiks.com/NewFiles1/BodyGaudi.html


1xAxiom ax 1.2 2xPolk Audio R30 2xMordaunt-Short 3.0 H/K AVR 225 Paradigm PDR-10 Sub HTR MX-500