Many thanks for all your comments and advice. (It is a super website, despite what others might say! LOL) I have now gone for a LS 400. I was too concerned about the suspension issues on the 430 to take the risk.
I have bought a one owner, 72,000 mile, 1998 MkIV, with service history. Owned from new by a man in his 80's.who has given up driving. It is in very good condition inside and out, with original sheepskin mats. All handbooks and tool kit - torch is still in the plastic!
Everything seems to work except the key fob to open the boot. No dents or major scratches. It drives like a dream. I had forgotten how quiet the engine is at tick-over. I believe have tried everything electric - all works. Very slight wear on driver's seat (usual place). Alloys could do with a refurb but not terrible. Very tight to get in the garage, but I think worth the effort! I sound the horn and the wife comes out to spot for me!
Will post some photos. I think I paid a fair price for such a gem - but I feel worth every penny !
Will post more on how it drives / runs as I use it.
Thank you once again for all your advice.
Regards
Dave