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T206Collector...then I would have a very hard time buying it.
If people want to feel like their collection of PSA 7 T206 cards are all unaltered, that's their choice. If I were them, I'd spend the time and dollars it would take for SGC to take a look at them, too. And, if I was a PSA guy, I'd just send them back in to PSA after SGC got done taking a look.
If you are comfortable that your 7's are really 7's, then you should have no problem submitting them once or twice to the two leading grading companies. They won't hurt the cards (and even if they did, that's what insurance is for). But you won't do that, because you are afraid of what the grader might say next time.