7. Lockheed F-117 Nighthawk
Price – $112 million
The Nighthawk F-117 is one of the original stealth planes, taking its maiden flight back in 1981, only to be officially introduced a couple of years later. There were 64 built over the years, but the planes were retired in 2008 after serving more than enough years in the US Air Force.
The F-117 played a key role in the Gulf War, but it also took part of the Yugoslavian war in the 90s, when one was actually taken down, despite being called invincible until then. The average cost for one of these planes is north of $111 million, which is a pretty impressive sum considering the era this was built in and the fact that it has already been retired.