Well I've taken the plunge and bought a 1996 850R, so far so good, and it goes like snow off a shovel, everything works and comes with a nice comprehensive service history. I might get to hack it down to the south of France this summer (it will make putting up with the 'in laws' more bearable)
Will keep you posted if anything drops off, and thanks to all who helped with info on these cars.
ttfn....Alistair