69 Dodge Dart GTS - Opinions

I agree with what others have said. That car is so different from what a GTS came with, the seller should be adding no price premium for it originally being a GTS. Ask him what his asking price would be if the Dart started life as a slant 6 car since it would probably be a few $$$ less than what he's asking for it being a GTS. That slant 6 price plus the mods he made to it is what it is worth not the price of a GTS plus the mods he put into it.