The Gridiron

An equal-weighted basket of the 9 cards here tracked at one fixed PSA grade (base 1,000). 1 of the 10 shown is not pinned to a grade and sits outside the reading. Descriptive, never predictive · based on asking prices, not sale prices — the middle of the range, with the highest and lowest set aside. How this is calculated. Live reading from the engine; updates twice daily.