Cards stored in 9-page sheets in a binder can definitely get damaged, but mainly through degradation of the sheets or through humidity. Personally, if they were high grade, I would move them all to Card Saver 1s as well. Carrying the books around could also lead to surface damage by the cards sliding around in the pages.
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PWCC: The Fish Stinks From the Head
PSA: Regularly Get Cheated
BGS: Can't detect trimming on modern
SGC: Closed auto authentication business
JSA: Approved same T206 Autos before SGC
Oh, what a difference a year makes.
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