What's a '66 Barracuda Formula S, 4-speed project car worth?

UPDATE: I offered him $3,000, but he said that is too low for him and says the absolute lowest he will go is $4,100. I bumped my offer up to $3,500 and he still won't budge. We're only $600 away from each other at this point, but I could use that spare $600 to get that Barracuda road worthy again!
Let him think about it. He's willing to deal and so are you. I don't know your intent, passion for the car, or your finances but I wouldn't pass on it over $600. You'll kick yourself forever. I passed on a nice 64 Dart her a year or so back. :BangHead::BangHead::BangHead::BangHead: I'm still kicking myself and it wasn't the money, It's because it was on the east coast. What a dummy I was.