You can restore them over and over but they are only original once. My '64 was very original and somewhat low mileage (54K) when I got it. Fortunately not so perfect or low miles that I hesitated driving it.
Beautiful TR6. The new owner faces a dilemma -- whether to drive or not -- unless he is a dealer (might be from that eBay ID though he has (0) feedback which is interesting).
Personally, my interest is driving first and foremost. That is after all what they are built to do.