Accurate
I find the Pop reports for SGC & PSA to be pretty accurate for T210, T211, and T213-1's. I have done a lot of research on these 3 groups and other than a little ambiguity from the sites, patterns can be discerned allowing you to understand scarcity and the like.
As for T206, I wouldn't touch that as it is out of my scope of collecting and honestly the information provided is probably better than having no information, so it does help to some degree depending on what you collect.
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Collector of Nashville & Southern Memorabilia
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