what are these wheels worth?

I respectful disagree. :D

The centers are highly sought after if small bolt pattern. $200 minimum for the centers alone in my opinion. Wheels and trim rings have to be worth another $200 and the tires are a bonus for any interested buyer even if they are old.

I wouldn't let them go for under $400. The only problem not much demand for these wheels. But if you are taking a 70 Duster back to original and needed these wheels or just wanted to update any other pre71 "A" body with nicer wheels $400 would be bargain.

They look nice I would probably give you $400 myself for them if you were local to me in California