I bought 5 AB 206,s and container loads of unused parts incl dozens of engines , both C 20 and C 18 . All i can say is i would stay away from the whole AB /Bell fiasco as you will only be driven mad by red tape .
I did quite well and sold all the helicopters but i eventually sold off all the parts and C 18 engines for pennies just to get rid of them . Strangely they went to America , where they cant be used !!