Strategy for buying car back from current owner

[BillD]

I have been trying to buy a 68 Camaro that I sold in 1970. I located the current owner a little over 10 years ago. Here's the car:
https://www.yenko.net/attachments/189...amarosmall.jpg

I have attempted to buy it several times over the last 10 years or so. I got a yes once but then he changed his mind. The last several years I have had no response to my calls and notes. The car has been put in storage some where several years ago. It would need a rather substantial resto and the original L78
motor is gone. Any ideas that might work? Other than the obvious of grossly over paying for the car?