This has probably been asked before but...

GeoffEighinger

Isn't it kind of easy for the edges of cards to be damaged in graded card holders? All the shaking and shuffling.

Wabittwax

I've been dealing in PSA cards for a long time and it's never happened to me. I've never even heard of it happening. One guy on here a while back posted a picture of when he dropped a few hundred PSA cards all over the floor on accident. If none of his cards got damaged then I would assume it's almost impossible to damage them. I'm not totally sure, there could be a horror story out there though, or at least one made up by some anti PSA guys.

NathanSr

Yes, if it is a die cut card that has pointy edges and they did not use the plastic insert. I have one that this happened to.

Nathan Sr.

Griffins

Here's a fun experiment- Bruce Moreland took a PSA card to Home Depot and attached it to a paint shaker to see what happened to it
BruceMo's Shaking Slab Test

On this page he put it in a sock and ran it thru the clothes dryer
BruceMo's Baking Slab Test

The rest of his site is worth a few minutes as well.

bri2327

Ok....I have a semi-horrible story...I say semi because it wasnt a high $$ card. Over the holiday I busted a few 85 Donruss factory sets, and I pulled a perfect Ryan. I brought it in to my father in law so we could compare it to the PSA 10 I already own.....well, the old guy dropped the PSA 10, and when i picked it up off the marble kitchen floor the left edge had a split in it almost an inch long. Guess the raw card that I had just pulled won the comparison !!