Slabline™
Graded-card protection score
Slabline™All graded cards →What a PSA 9 is worth — from its recorded sales.
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eBay, Fanatics Collect, Alt, MySlabs, Goldin and Heritage records arrive through CardHedge's licensed feed; REA, SCP and Huggins & Scott are read from each house's published prices realized. More eBay, Goldin and auction sales come from The Card API.
Sales seen on eBay, Fanatics Collect, Goldin, Heritage, Alt and MySlabs, via CardHedge. "Marketplace" is a real CardHedge sale whose venue is not identified yet.
A PSA 9 1975 Topps George Brett #228 is worth about $10,900, the median of its 5 most recent recorded PSA 9 sales. Slabline holds 75 recorded PSA 9 sales of this card between August 2017 and November 2026; the most recent sold for $10,800 on November 7, 2026. At other grades it is valued at about $365 (Grade 7), $1,035 (Grade 8), $21,067 (Grade 9.5).
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Log scale — prices across these grades span more than 20×.
How much the 1975 Topps George Brett #228 is worth at each grade.
How to read this page: an estimate is Slabline's figure for a grade, built from the source named beside it. An observed price is the latest price a grader's copy of this card fetched, one cell per grader and grade in the grid below. A recorded sale is a dated transaction with its venue. The headline above is the estimate for this slab's own grade.
| Grade | Value | Built from |
|---|---|---|
| Raw / Ungraded | $158est. | 48 recorded raw sales |
| Grade 7 | $365 | 60 recorded sales |
| Grade 8 | $1,035 | 60 recorded sales |
| Grade 9 | $10,900 | 5 recorded sales |
| Grade 9.5 | $21,067 | guide, rescaled to sales |
| Gem Mint 10 | $32,059 | guide, rescaled to sales |
Price guide data: SportsCardsPro
Price checked today · last recorded sale 6 days ago (PSA 9) · 173 sales in the last 90 days (all grades)
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Add to my collection — free →Values are informational estimates built from recent comparable sales — not a certified appraisal, insurance, or financial advice. Card values fluctuate; figures are a snapshot and may differ from a realized sale.