What is the most expensive thing in the universe?

Answer 1

It depends on what you call a "thing".The most expensive single object is the International Space Station (ISS), at $157 billion. However, it is not complete. It is expected to be done in 2011 (as of January 2011). The most expensive completed object is the Itaipu Dam in Brazil at $27 billion.

But antimatter is the most expensive known substance. It is $62.5 quadrillion a kilogram ($28 quadrillion a pound).