Thanks for the info!
Everyone: thank you for your valuable input so far! And I will mention this AW139 in Belgium, of course. Chopper would be based in JED, KSA with flights to destinations nearby, sometimes at higher elevations @ temp. of > 45-50 deg. C in the summer. That's as much as I know right now. No Government directly involved, to my knowledge.
If there are more questions, I will come back in this forum.
I will forward the messages to the potential buyer, but - as I have seen it many times in Aviation - the eyes are sometimes bigger than the wallets are deep...