Bad news I'm afraid.. The guy won't sell..
Apparently this dude, Robin, got given
this bike by an old mate 15 years ago and as such has quite a bit of sentmiental value attached to it.. So, having chatted to his wife about it has decided to hold onto it..
I know of a few of these for sale privately, cheapest 1 being $US4000 frame only. have you offered him any amount for it?
If it holds that much sentimental use he'd be taking care of it rather than kiddie carrier cheap bike fodder
WTD- Shimano M980 XTR Rear Derailleur