What is the Slabline Score?

The Slabline Score is a credit-style 0–1000 protection score for a graded trading-card collection, blended from five weighted factors: Insurance (35%), Concentration (25%), Storage (20%), Liquidity (10%), and Provenance (10%). Higher is better; bands run A (≥880) to F (<400).

How does Slabline value my graded cards?

Each card is valued from recent comparable sales for the exact graded card (by certification number and grade), aggregated across eBay, Heritage, Goldin, and PWCC. More comps yield a tighter, higher-confidence value.

Does Slabline sell insurance?

No. Slabline is software that produces broker-ready insurance schedules and risk reports. It is not an insurer, broker, or appraiser and does not provide insurance, financial, or legal advice.

Which cards and categories does Slabline support?

Graded slabs from PSA, BGS, SGC, and CGC across baseball, basketball, football, soccer, Formula 1 / racing, hockey, Pokémon, and Magic.

How much does Slabline cost?

There is a free Ledger tier for up to 25 cards. Collector is $99/year (or $9.99/month) and removes the card limit for an unlimited collection. Insured is $149/year (or $14.99/month) and adds broker-ready insurance schedules and a weekly intelligence brief. A Vaulted tier adds connected Hobby Smart Case hardware.

What is the Hobby Smart Case?

A connected travel case (Travel 40, 75, and Pro) with per-slot temperature, humidity, light, and tamper monitoring, plus GPS location and a chain-of-custody log — turning storage risk into live, sensor-verified data. Launching Q2 2027.

How much is a PSA 10 1975 O Pee Chee Hank Aaron #660 worth?

A PSA 10 1975 O Pee Chee Hank Aaron #660 is worth approximately $10,488, the price-guide estimate for this grade. Card values fluctuate with the market.

What's the difference between a Grade 9 and a Gem Mint 10 Hank Aaron?

For the 1975 O Pee Chee Hank Aaron #660, a Grade 9 is worth about $3,566 while a Gem Mint 10 is about $10,488 — the grade gap is roughly $6,922.

How does Slabline value the Hank Aaron card?

Slabline starts from the price guides for the card and grade. When it holds dated recorded sales of that exact card and grade — from CardHedge market data and the auction houses it ingests — the headline becomes the median of the most recent ones and the grade ladder rescales to match. Each row on the page names which of those it is.

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1975 O Pee Chee Hank Aaron #660

Q: How does Slabline value my graded cards?

Each card is valued from recent comparable sales for the exact graded card (by certification number and grade), aggregated across eBay, Heritage, Goldin, and PWCC. More comps yield a tighter, higher-confidence value.

Q: Does Slabline sell insurance?

No. Slabline is software that produces broker-ready insurance schedules and risk reports. It is not an insurer, broker, or appraiser and does not provide insurance, financial, or legal advice.

Q: Which cards and categories does Slabline support?

Graded slabs from PSA, BGS, SGC, and CGC across baseball, basketball, football, soccer, Formula 1 / racing, hockey, Pokémon, and Magic.

Q: How much does Slabline cost?

There is a free Ledger tier for up to 25 cards. Collector is $99/year (or $9.99/month) and removes the card limit for an unlimited collection. Insured is $149/year (or $14.99/month) and adds broker-ready insurance schedules and a weekly intelligence brief. A Vaulted tier adds connected Hobby Smart Case hardware.

Q: What is the Hobby Smart Case?

A connected travel case (Travel 40, 75, and Pro) with per-slot temperature, humidity, light, and tamper monitoring, plus GPS location and a chain-of-custody log — turning storage risk into live, sensor-verified data. Launching Q2 2027.

What a PSA 10 is worth — price-guide estimate, with every recorded sale we hold.

Estimated value · PSA 10

$10,488

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Estimated · no recorded PSA 10 sales — this grade rarely trades publicly, so the figure is derived from nearby grades, not a direct sale.

246recorded sales

Representative photo · another grade or parallel of this card

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1975 O Pee Chee checklist→Baseball market index+0.1% 1W Hank Aaron index-0.5% 1W

Recorded sales · all grades

Highest Baseball sales →

ⓘ Where these sales come from

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 · house pending" is a real CardHedge sale whose house is not matched yet.

No recorded PSA 10 sales — this grade rarely trades publicly. Showing PSA 9, the nearest grade with recorded sales.

All venues · 241 sales · 2020–2026

▼ 98.8% first → latest

Hover for any sale · click to find it in the list

Log scale — the prices span more than 20×.

Sep 21, 2026 · eBay · PSA 6$86
Sep 21, 2026 · eBay · PSA 5$50
Sep 20, 2026 · eBay · PSA 6$85
Sep 20, 2026 · eBay · PSA 8$610
Sep 18, 2026 · eBay · PSA 7$212
Sep 17, 2026 · eBay · PSA 5$35
Sep 16, 2026 · eBay · PSA 7$193
Sep 15, 2026 · eBay · PSA 7$225
Sep 14, 2026 · eBay · PSA 5$42
Sep 2, 2026 · eBay · PSA 6$57

Value by grade

How much the 1975 O Pee Chee Hank Aaron #660 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	$486est.	estimate
Grade 7	$212est.	38 recorded sales
Grade 8	$575est.	15 recorded sales
Grade 9	$3,566est.	estimate
Grade 9.5	$6,892est.	estimate
Gem Mint 10	$10,488est.	estimate

Price guide data: SportsCardsPro

Estimated from this category's observed grade curve and this card's known value — no per-grade sales recorded yet. Estimates, not observed prices.

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Tracked history · PSA 10

Price checked today · last recorded sale 21 days ago at eBay (PSA 9) · 37 sales in the last 90 days

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Frequently asked

How much is a PSA 10 1975 O Pee Chee Hank Aaron #660 worth?: A PSA 10 1975 O Pee Chee Hank Aaron #660 is worth approximately $10,488, the price-guide estimate for this grade. Card values fluctuate with the market.
What's the difference between a Grade 9 and a Gem Mint 10 Hank Aaron?: For the 1975 O Pee Chee Hank Aaron #660, a Grade 9 is worth about $3,566 while a Gem Mint 10 is about $10,488 — the grade gap is roughly $6,922.
How does Slabline value the Hank Aaron card?: Slabline starts from the price guides for the card and grade. When it holds dated recorded sales of that exact card and grade — from CardHedge market data and the auction houses it ingests — the headline becomes the median of the most recent ones and the grade ladder rescales to match. Each row on the page names which of those it is.

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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.