Grade Matrix
PSA
PSA 6
-
PSA 7
-
PSA 8
$1
PSA 9
$8
PSA 10
$33
PSA 10: PriceCharting; refreshed Sep 10, 2026
CGC
CGC 8
-
CGC 9
-
CGC 10
$20
CGC P10
-
Availability
Availabilityi
3/10G: —
Graded: insufficient data · Sales per year: ~43 sales/yr · Graded copies: 10
TCGplayer Price History
NormalProduct 107265Fetched Sep 7, 3:47 AM
TCGplayer market
$0.30
Latest avg sale
$0.40
Units sold
1,939
Card Value FAQ
How much is a PSA 10 Professor's Letter (BREAKthrough #146) worth?
A PSA 10 Professor's Letter (BREAKthrough #146) is currently shown at $32.65. GemDelta labels this as an unverified PriceCharting guide fallback rather than verified recent sales.