1970 Dart GT Value?

I'd say a good strong $20,000.. I thought I paid a premium for my 70 Swinger. It's a 318 column shift auto with bench seat. Your's looks similar, has a 340 upgrade, buckets, and console. (i don't think GT's came with all those goodies. )

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GT’s came with the buckets and a console. That and the badging was about the whole package in ‘70/‘71, they did get different seat covers. They did not come with the 340, they were /6 or 318 cars.