Hallelujah, time for an update!! I am thrilled to death to have grabbed up this virtually perfectly-centered card today...
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You have to imagine that the vast majority of people sending in cards to be graded are sending in the best versions they can find. In other words, the untold millions of way off-centered and tilted Killebrew cards were left at home and only the 'cream of the crop' were submitted, so the Killers sitting in high-grade slabs represent the 'best' there is out there. With that in mind, I searched for all the past PSA 8 sales I could find (there really aren't too many), and virtually every one of them is still hampered by 'weak' (obviously subject to opinion) centering and/or varying degrees of tilt. Perfectly centered ones seem to be non-existent...
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Same is true for many of the PSA 9's...
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Conclusion: The 1972 Topps #52 Harmon Killebrew 'In Action' card continues to be an OCD sufferer's worst nightmare!!!