Centering: Measure borders (Yellow border on vintage, grey on modern) get the ratio between the 2 numbers (division of the total) Between 50/50 & 55/45 on the front and 50/50 & 75/25 on the back (considered gem mint centering) Between 56/44 & 60/40 on the front and 76/25 & 90/10 on the back -1 point Between 61/39 & 65/35 on the front and 90/10 or better on the back -2 points Between 66/34 & 70/30 on the front and 90/10 or better on the back -3 points Note: If card starts to worsen from centering from here at a PSA 7 but everything else is perfect about the card, in some cases a grader will do you a favor and give you a 9 (OC) qualifier to designate card is great but is off centered
This process involves sending your card to professional grading services that authenticate it and assign a score from 1 to 10 based on its condition
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The same is true for first strike, double strike, deathtouch, hexproof, haste, indestructible, lifelink, menace, reach, trample, and vigilance
