been said, but with no doubt, mine would be THE BLACKBIRD.
A fantastic, revolutionary machine, and soooo sexy.
I imagine just the start-up on a SR-71, and i go mad.......would pay for that.
And try to imagine the skills needed to fly a 8 hours mission with 3 or 4 refuelings, 3 or 4 supersonic jumps, taking pictures with your sensors while you are navigating your plane at 80.000ft/ 3.2 MACH .... WOW