A good set of used, rust-free doors for a '64-'66 Chevy truck, can go for $500.00 per pair. Make an offer and commence the negotiation process. If you need a good, rust-free pair, they are worth whatever you are willing to pay. If you feel like the seller is holding you up, take your business elsewhere. New reproduction door shells are now available for $400.00-$500.00 each. Go used, OEM if you can, whereas they are a better fit and finish. The imitations are not the same quality, fit or finish. Good luck with your project.

Tony