Maughan,
I would LOVE an all carbon T. Would not buy one as I already have a T, plan to buy a late modle Marstrom soon as a second boat and after that would prefer to put the rest of my money into something else.
However, If it was going for rig price, I would snatch it up.
My advice would be that it would not be worth much more than rig and other equiptment value. ie platform not worth much.
By all means buy it and pay premium price if you are happy or use the above information to bargin down.
If you are not intending to race as a Tornado ever, this boat should be great fun. You can put carbon beams, mast, foils or hydrofoils on it, increase sail area ect.
If you were in Australia, I would be the first to put my hand up for a ride and we might even let you un-officaly race in the Tornado regattas.