I don't understand there are peoples who peels off the protector or trashing ITG's slabs on theirs Ultimate Memorabilia cards....
I was shocked when I once won a UM card with Cujo and the seller never mentioned that the card was unslabbed and the price went up high...but it was +10 years ago and ebay doesn't had same customer protection program like in todays....So the best is to keep those in same condition like as they came outta the packs if you're going to sell those in the future.