If it has a recording engine analyzer installed (many a/c of that class,
performance do), ask for a memory dump of whatever is stored in its memory
and watch that memory dump take place, if possible. That could tell a lot
about how it's been operated.

DL

wrote in message
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snip.

Play dumb and interested. At a minimum, ask about %power at
cruise/fuel flow/ITT-after all, you want to keep operating it the same
way it's been operated ; ) Ask him/her to take you for an extended
test hop to "see how it flies". Pay close attention to his/her
climb/cruise profile & power settings and the indicated temps. Ask
about performance and altitude & have him/her show you. Check the oil
consumption after 30 minutes in cruise, minimum. Paying for a little
fuel can net you a lot of information.

TC