I've recently become a sucker for the last of the big early '70s 4-Door Hardtops, as a result of watching a youtube guy called Adam on Rare Classic Cars & Automotive History. He seems to find absolutely beautiful low-mileage examples of these luxo-barge dinosaurs and explains why they are still so appealing. He finds a lot in the middle price range, and here are a few examples of what are apparently, the sleepers on the American scene.