I don't believe the article is accurate - '71 hemi 'cuda hardtops don't average $900K (the last 2 cars that sold at BJ were 4-speeds: 7/22 NV $550K, 1/22 AZ $935K)
one could use these 3 cars & state '71 hemi'cuda 4-speed hardtop values have dropped 60% in the last 18 months

just because the low mile "Reynolds" bench seat automatic sold for 7-figures doesn't indicate that any other automatic hemi'cuda is worth anywhere near that