I can see that you're already developed an emotional attachment to this Z. I think you should see the car in person, do a very close inspection for overall condition and rust, go back home, and price out parts and labor to get the car to the condition you want. Then, make an offer based on those costs. If you point out to the buyer what it will cost to revive, you'll have a strong bargaining point. Most of the metal that rusts on a Z is available in the aftermarket as "patch" panels. If you have access to a body shop, and know how to use it, that will lower repair costs. As it sits, I don't feel that it's a $4K car. Obviously it's been sitting for years, so you shouldn't have to worry about other potential buyers outbidding you. The old saying, "act in haste, repent at leisure" comes to mind. Dennis