Estimates a Likely Max Grade (PSA) using grade‑killer caps (creases, scratches, stains, edge chipping) and a weighted condition score. Centering options use conservative, easy labels so “75/25+” reads as bad, even if PSA sometimes tolerates it.
Weight: 3
Weight: 5
Weight: 4
Weight: 2
Weight: 1
Weight: 0
Conservative: anything ≥75/25 is treated as bad.
We label 75/25+ as bad/very bad to match collector expectations.