Steer clear of the rotten things - being ex-military, they are subject to different rules, and when the big-time users in the US discover yet another fault in some part of the system, you will be required to change yet another part.
Expect to throw away your expensive TT straps every 2 years regardless of condition. We are buying a new mast because of a tiny burr left behind in the spline cutting process. Just had an engine overhaul, checks on T/R cables etc.
This bird must cost us over $30,000 an hour to fly it (we don't do many hours) and although it is a hair-on-yer-chest man's helicopter to fly, it is a tragic waste of money if you were trying to run it commercially.
Don't expect to have passengers inside it, just loads underneath it. And fill in your RIN sheets carefully or your mast and trunnion will not see out their lives. Or yours.