Low-Value Cards: If the card is inexpensive, the cost of grading may outweigh any increase in value.
Visible Damage: Cards with noticeable flaws like creases, heavy edge wear, or miscentering are unlikely to receive a high grade, making grading less worthwhile.
Common or Base Cards: Unless they are rare variations, parallels, or highly sought-after players, mass-produced base cards may not benefit much from grading.