On a set like 1952 Topps, the odds of pulling ANY card in a 9 or 10 are nearly 0. You're more likely to pull 5-7s with a few OCs and one scrap card with severe gum and/or wax residue. If the pack has ever been dropped or bumped in the wrong way, you're starting off at no better than 4s across the board.
If you're not opening a high series packs (which is unlikely), even the 9s won't return enough to cover the cost of the pack. You're basically hoping you pull a Mays or a Pafko in 9+ condition, and that simply not a gamble that's going to pay off
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