The P-51's first flight was in October 1940; in service January 1942. Top speed 437 MPH. The unit cost around $51K (1945 dollars)
The F-22's first flight was September 1997; in service December 2005. Top speed ~1,500 MPH, The unit cost ~$150 million (2009 dollars)
Here they are flying in...
I was at an airshow and they had a F-22 Raptor on display - the plane later showed off some of its amazing capabilities. I'll have more images of this amazing plane as I get them processed.