How much is a 1966 fury3 worth its a hard top two door with a 318 8cyl has around 80000 miles its in great shape?

Low retail, $3800. Average retail, $6175. High retail, $10650. It's all about condition and factory options. And by the way, they didn't have a 318 cid engine that vehicle in 1966. It would have had a 273 cid engine.