Professor's Research #23 PSA 10: price & population
PSA 10
$270.00
Raw
$1.50
PSA 10 pop
77
Gem rate
8.0%
A PSA 10 Professor's Research #23 from Celebrations sells for $270.00 — a 17,900% premium over the $1.50 raw price. PSA has graded this card 961 times; 77 came back a 10 (8.0% gem rate), and 398 a PSA 9.
The 9-to-10 spread
PSA 9 sells for $14.97. The jump from 9 to 10 is worth $255.03 — that spread, times your real odds of the 10, is what decides whether grading pays.
Prices from real completed sales, updated daily. Population data from PSA's public population report.
