
What the evidence says
Tier evidence · Fresh
PSA 10$600.8530-day average · Provider-reported approximate sale count: 257 · Evidence date September 17, 2026 · Fresh
PSA 9$187.4130-day average · Provider-reported approximate sale count: 238 · Evidence date September 18, 2026 · Fresh
PSA 8$160.0030-day average · Provider-reported approximate sale count: 57 · Evidence date September 17, 2026 · Fresh
PSA 10 versus PSA 9 30-day-average spread: $413.44 · 220.61% premium · 3.21x