Need an opinion on a 1967 'Cuda.

Hello everyone. I'm new to this forum and could use another non bias opinion. I have the opportunity to purchase a 1967 Cuda fastback. It is a clean rust free example with nice original interior. Fresh paint and a clean 318 bored 40 over with an auto transmission. Took it for a ride and all is good. Has upgraded power brakes and a installed transmission cooler. A very nice driver. Senior owned and asking price was 13900. Got him down to 12800. Is this a good deal for the car or should I walk away? Any help would be appreciated. Thanks.