Lockheed Martin F-22 Raptor
The F-22 Raptor is a 5th generation fighter and is a very expensive plane to produce. In order to protect the F-22 Raptor's stealth technology and classified systems, the U.S. has not sold the F-22 Raptor to other countries. If they do, they will export them in a state that isn't as powerful as the ones used by the U.S.