Grade Matrix
Graded
PSA 6
$5
Grade 7 guide
$8
Grade 8 guide
$10
PSA 9
$14
PSA 10
$270
PSA 10: 1 sale, last 45 days · Sep 30, 2026 · checked Oct 25, 2026
PSA 9: Median of 12 PSA 9 sales in the last 90 days, latest 2026-10-17. Grade 9 guide (all graders): $15.
Grade 7 and Grade 8 are PriceCharting guides across all graders (PSA, CGC, BGS, SGC, TAG).
CGC
CGC 8
-
CGC 9
$3
CGC 10
$15
CGC P10
-
Availability
Availabilityi
8/10G: 6/y
Graded: ~6 sales/yr (extremely low) · Sales per year: ~277 sales/yr · Recent sales: 3 PSA 10 comps · Raw recent sales: 60 · Grade 9 recent sales: 30 · PSA 10 recent sales: 28 · Graded copies: 975 · PSA-10 delta 4.1%
TCGplayer Price History
HolofoilProduct 250318Fetched Oct 22, 3:55 AM
Weekly market
$0.30
week ending Oct 21
Weekly avg sale
$0.23
week ending Oct 21
Units sold (week)
22
week ending Oct 21
Card Value FAQ
How much is a PSA 10 Professor's Research (Celebrations #23) worth?
A PSA 10 Professor's Research (Celebrations #23) is currently shown at $270, the only PSA 10 sale in the last 45 days (Sep 30, 2026).
PSA 10 Recent sales
| Date | Listing | Sale |
|---|---|---|
| Sep 30, 2026 | Pokemon Celebrations Professor's Research Professor Oak 023/025 PSA 10 023/025 | $270.00 |
| Aug 17, 2026 | Pokemon Celebrations Professor's Research 023/025 PSA 10 ~~[SUPER LOW POP 77]~~ 022/025 | $349.95 |
| Aug 12, 2026 | Pokemon 2021 Celebrations Professors Research 023/025 PSA 10 022/025 | $364.37 |
| May 23, 2026 | 2021 POKEMON CELEBRATIONS #023 PROFESSOR'S RESEARCH PSA 10 #023 | $225.00 |