Depends on the card
Topps cards???
Trimmed Topps cards hold little value compared to a PSA-8
In General, Id say worth 5%-10%, if not less in most cases.
Trimmed cards in vintage sets hold more value.
Different reasons for trimming.... some cards are trimmed to deceive (make condition look better), and some cards were trimmed so they would fit into sheets or match size of other T/E card sets.
The word "warp" might mean "batwing"
Trimmed cards will often get "batwings" meaning the ends of the cuts taper outward. You would need a high quality scan to see it usually. A digital picture will distort the edges so is not good for IDing trimmed cards.
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