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 SGC 8 1955 Topps Sandy Koufax #123 worth?

A SGC 8 1955 Topps Sandy Koufax #123 is worth approximately $3,960, 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 Sandy Koufax?

For the 1955 Topps Sandy Koufax #123, a Grade 9 is worth about $50,327 while a Gem Mint 10 is about $60,392 — the grade gap is roughly $10,065.

How does Slabline value the Sandy Koufax 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.

How much is a raw (ungraded) 1955 Topps Sandy Koufax #123 worth?

A raw (ungraded) 1955 Topps Sandy Koufax #123 is worth about $824, based on recent comparable sales. Values move with the market — track it free in Slabline to see the current number.

How much is a PSA 7 1955 Topps Sandy Koufax #123 worth?

A PSA 7 1955 Topps Sandy Koufax #123 is worth about $1,535, based on recent comparable sales. Values move with the market — track it free in Slabline to see the current number.

How much is a PSA 8 1955 Topps Sandy Koufax #123 worth?

A PSA 8 1955 Topps Sandy Koufax #123 is worth about $3,960, based on recent comparable sales. Values move with the market — track it free in Slabline to see the current number.

How much is a PSA 9 1955 Topps Sandy Koufax #123 worth?

A PSA 9 1955 Topps Sandy Koufax #123 is worth about $50,327, based on recent comparable sales. Values move with the market — track it free in Slabline to see the current number.

How much is a PSA 9.5 1955 Topps Sandy Koufax #123 worth?

A PSA 9.5 1955 Topps Sandy Koufax #123 is worth about $55,359, based on recent comparable sales. Values move with the market — track it free in Slabline to see the current number.

How much is a PSA 10 1955 Topps Sandy Koufax #123 worth?

A PSA 10 1955 Topps Sandy Koufax #123 is worth about $60,392, based on recent comparable sales. Values move with the market — track it free in Slabline to see the current number.

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1955 Topps Sandy Koufax #123

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 SGC 8 is worth — price-guide estimate, with every recorded sale we hold.

Photo from an eBay listing · Shop this card on eBay →

Estimated value · SGC 8

$3,960

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Based on 3 recorded sales of this card at SGC 8 (latest Sep 8, 2026) — price guides differ on this card.

119recorded sales

Representative photo · another grade or parallel of this card

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1955 Topps checklist→Baseball market index+0.1% 1W Sandy Koufax index-1.6% 1W

Recorded sales · SGC 8

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.

All venues · 8 sales · 2021–2025

▲ 31.9% first → latest

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

Jul 25, 2025 · Fanatics Collect · SGC 8$15,500
2024Apr 13, 2024 · eBay · SGC 8$14,000
Mar 12, 2024 · eBay · SGC 8$13,500
Jan 8, 2024 · eBay · SGC 8$15,500
2023Dec 19, 2023 · eBay · SGC 8$18,100
May 28, 2023 · eBay · SGC 8$20,000
2021Jun 30, 2021 · eBay · SGC 8$8,326
Feb 2, 2021 · eBay · SGC 8$11,750

Value by grade

How much the 1955 Topps Sandy Koufax #123 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	$824	guide, rescaled to sales
Grade 7	$6,400	5 recorded sales
Grade 8	$3,960	recorded sales
Grade 9	$50,327	guide, rescaled to sales
Grade 9.5	$55,359	guide, rescaled to sales
Gem Mint 10	$60,392	guide, rescaled to sales

Price guide data: SportsCardsPro

Loading every grader…

Tracked history · SGC 8

Current value

$3,960

Sales, past year (all grades)

233

Price checked today · last recorded sale 1 months ago at eBay (SGC 8) · 2 sales in the last 90 days

If you had to sell today

Liquidity

Market value

$3,960

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Quick-sale recovery

≈ $2,376

60% recovered

A dealer typically pays about 60% of market for a fast, guaranteed sale — the rest is the liquidity gap. An auction or private sale can recover more but takes time and fees. It’s why your Slabline Score weighs liquidity — and why insuring at market matters: a fire-sale recovers far less than the number you’re covered for.

Estimated from dealer buy-vs-sell spreads; actual offers vary by condition and demand.

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Frequently asked

How much is a SGC 8 1955 Topps Sandy Koufax #123 worth?: A SGC 8 1955 Topps Sandy Koufax #123 is worth approximately $3,960, 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 Sandy Koufax?: For the 1955 Topps Sandy Koufax #123, a Grade 9 is worth about $50,327 while a Gem Mint 10 is about $60,392 — the grade gap is roughly $10,065.
How does Slabline value the Sandy Koufax 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.
How much is a raw (ungraded) 1955 Topps Sandy Koufax #123 worth?: A raw (ungraded) 1955 Topps Sandy Koufax #123 is worth about $824, based on recent comparable sales. Values move with the market — track it free in Slabline to see the current number.
How much is a PSA 7 1955 Topps Sandy Koufax #123 worth?: A PSA 7 1955 Topps Sandy Koufax #123 is worth about $1,535, based on recent comparable sales. Values move with the market — track it free in Slabline to see the current number.
How much is a PSA 8 1955 Topps Sandy Koufax #123 worth?: A PSA 8 1955 Topps Sandy Koufax #123 is worth about $3,960, based on recent comparable sales. Values move with the market — track it free in Slabline to see the current number.
How much is a PSA 9 1955 Topps Sandy Koufax #123 worth?: A PSA 9 1955 Topps Sandy Koufax #123 is worth about $50,327, based on recent comparable sales. Values move with the market — track it free in Slabline to see the current number.
How much is a PSA 9.5 1955 Topps Sandy Koufax #123 worth?: A PSA 9.5 1955 Topps Sandy Koufax #123 is worth about $55,359, based on recent comparable sales. Values move with the market — track it free in Slabline to see the current number.
How much is a PSA 10 1955 Topps Sandy Koufax #123 worth?: A PSA 10 1955 Topps Sandy Koufax #123 is worth about $60,392, based on recent comparable sales. Values move with the market — track it free in Slabline to see the current number.
How much would I actually get selling the 1955 Topps Sandy Koufax #123?: A quick sale to a dealer typically recovers about 60% of market value — roughly $2,376 on this card's $3,960 value. An auction or private sale can recover more but takes longer and charges fees. The gap between market value and quick-sale recovery is the card's liquidity risk.

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Guides

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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.