So, 800nm range? I wonder is that at max cruise? Might be able to eke a bit more out of it at .82 rather then .92
As for who'd want to buy it, plenty of people out there want it. And it's not really a business machine - it outperforms the L39C and the Hawk - it's really a mil trainer dressed up as a civilian aircraft. Ejection seats would swing it for me though, beats the BRS into a cocked hat, although the dangers are still there.
I'd want it for going places, but mainly the fun of having a very high perf machine that doesn't cost various appendages to run and can pull 8G+