Nigel, I was surprised to see you say that so had a look. This is the first one that came up:
1987 AGUSTA A109A MK II Turbine Helicopters For Sale At Controller.com
Amazing!
But why are parts (relatively) cheap? Why would they be <edit> little more </edit> than B206 parts in particular, given running two RR250 engines?
Cheers
JohnO