I agree with Adam, the Silver Eagle is a clear contender to your wishlist. Ticks most of criteria but will 'only' do 200-210 ktas. There is one on aso.com for 595k which is almost within your financial criteria. Anything faster ticking the rest of your criteria, like the great Jetprop (caveat for range though), is closer to 1M as IO mentioned. Let us know if you find the holy grail...