Wayne,
Unless the guy has asked the right questions (i.e. shipping arrangements, questions specific to your airplane, gee...with a useful load of about 400 lbs is it possible the Japan Aviation Authorities might not......, etc, etc) then it is a scam.
Can you even begin to imagine how long it would take to collect on a check from a "Regional Bank". What is that anyway? What about Exchange rates, etc.
This is a scam...don't bite, don't get sucked in. The story isn't consistent from reality. You hve seen several of our international brothers buy these planes, (including the 150/150 that went to Northern Europe) and they knew what basic questions to ask.
Sorry, but a career in banking exposes you to a lot of this junk.