Please keep the Zenith carbs and air filters. The Zeniths are getting harder to find now, and these should be WIP-3s. People will turn up their nose and say fit Weber or Stromberg, but these are the original carbs and more people are doing up cars to original spec now.
If there are any of the plastic parts under the switches on the dash, they are worth saving (the labels LIGHTS, PANEL, etc, and the surround around the heater control). These are unique to S3.
The soft-top frame is also worth keeping. Still plenty of people wanting to add a soft-top to a GT model.
Tail lights if they are in one piece.
And, as others have said, the suspension parts.
Sad to see one of the lowest production number cars lost, but I realise photos don't show the full state of the car.
We were collecting VIN numbers of demised cars, are you able to provide that?
Cheers,
Paul.