He does own a Z....
If your price was fair and the car in as good shape as you think then it would be sold, correct?
I bet you did throw a lot of money into it, which most of the Z guys do. Getting a Z car to the level you have it takes a lot of work. Problem is your tastes will be different from someone else, especially with custom work. You will not get $0.50 to the dollar when you do custom work like this. Unless you restored it to complete factory Original, you have to find the "RIGHT" buyer who is willing to pay for your car. I have seen a very nicely restored Z car go for $35000.
Just a grammar stab :
Stop calling poor Rturbo a "witch". Name calling is not very nice lol.