Hi Shambles, The other thing going against you is that I assume that being a 2002 model it would be a Mk 1 phase 2. When we were looking the OH wanted a Mk 2 so anything earlier than 03 wasn't even looked at.
I guess what I am saying is that you may be able to get top dollar for it, but prospective punters with the money you want for it may just assume yours (or your fathers) is an overpriced mk1 and not even notice the mileage.
You can always ask a high price and be willing to accept less, Not that many good condition MK1 phase 2 1 owner Scenics about most that have had a few owners are quite tatty.
Always a ready market for MPV type vehicles if in good condition..
But as others have said it's a buyers market out there.
But pitch it high and list the vehicle in detail.