Professor's Research #23 PSA 10: price & population
PSA 10
$232.23
Raw
$1.00
PSA 10 pop
77
Gem rate
8.6%
A PSA 10 Professor's Research #23 from Celebrations sells for $232.23 — a 23,123% premium over the $1.00 raw price. PSA has graded this card 892 times; 77 came back a 10 (8.6% gem rate), and 377 a PSA 9.
The 9-to-10 spread
PSA 9 sells for $11.69. The jump from 9 to 10 is worth $220.54 — 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.
