Value is subjective to different people, and what the person buying the car wants to pay for it. That's why I have this thread and try to record asking prices so people can cross reference and form their own opinions.
Personally I think all S30z's have been undervalued for ages, especially compared with say a Porsche 911 of the same era, but that is my opinion and it is subjective, the consensus so far seems to disagree with me. It's a double-edged sword, seeing values rise (for existing cars) means parts costs go up as more people looks to 'restore', 'maintain' or get into an S30z and cost of restoration also goes up with increase demand particularly for 'rare' parts. We should all be careful what we wish for .