No, iPhones and other Apple devices are priced differently in different countries. For example, the U.S. dollar equivalent of the new iPhone 6 in the Philippines will not be the same as the U.S. dollar price in the USA.
I work for AT&T, and we don't even know the price yet. No one will know until the press conference. However our higher ups don't want us to take days off as of September 19th so we are expecting it to launch around then.