Paul Allen's Mig-29 Fighter Jet

Microsoft co-founder Paul Allen is a serious aircraft enthusiast with deep pockets that know no bounds. This combination allowed him to acquire a Russian Mig-29 fighter jet, which was originally part of the Ukranian Air Force. 

It is not known if Allen will be climbing into the cockpit, but he's in for a serious thrill if he does. The Mig-29 is capable of reaching speeds of Mach 2.25; over twice the speed of sound.