Posted By:
Ryan ChristoffMark,
Yes, my estimate takes into consideration graded examples from all companies. Pop reports are almost always misleading, and this is no exception. For example, there is a PSA 7 Gibson that used to be an SGC 84. Does that count as 2 Gibsons known or one? It's one card, graded twice, but you'd never know it by adding up the total of all the pop reports.
I have personally gotten Gibsons graded by both SGC and GAI.
Pop reports are another good way for inaccurate information to be spread.
-Ryan