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Gem-Knight Master Diamond (Platinum Secret Rare) Quarter Century Stampede #RA04-EN178 Yu-Gi-Oh! card
Platinum Secret Rare

Gem-Knight Master Diamond (Platinum Secret Rare) Quarter Century Stampede #RA04-EN178

Card #RA04-EN178
Market value · ungraded
$0.25
▼ 10.7% · 30d
PSA 10
$32
128× raw
Blended from live market data · graded from real sold data
Confidence medium · estimate, not an appraisal · How we price →
Buy from here
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Gem-Knight Master Diamond (Platinum Secret Rare) is a Platinum Secret Rare Yu-Gi-Oh! card from Quarter Century Stampede (#RA04-EN178). Its current blended market value is $0.25 ungraded, with a PSA 10 worth around $32. Prices update from real market data.

Graded prices
Ungraded (raw)$0.25
PSA graded price estimates by grade
GradeRelative valuePrice
PSA 10$32$32–$32
PSA 9$6$6–$6
“Sold” = median of real recent sold listings at that grade (eBay or Fanatics Collect — hover a badge to see which). Other figures are blended marketplace estimates. Confidence reflects source backing and price spread — not PSA-official values.

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Price history · Raw

1 Apr 202521 Aug 2026
Latest
$0.25
Period high
$5.25
Period low
$0.25
Change
▼ 94.2%
Available to buy nowLive on eBay

Card details

Set
Quarter Century Stampede
Number
#RA04-EN178
Rarity
Platinum Secret Rare
Game
Yu-Gi-Oh!

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All Quarter Century Stampede cards →

Where to buy & check prices

Check recent sold prices
eBay sold

Frequently asked questions

How much is Gem-Knight Master Diamond (Platinum Secret Rare) worth?

Gem-Knight Master Diamond (Platinum Secret Rare) (Quarter Century Stampede #RA04-EN178) is worth around $0.25 ungraded, or about $32 in PSA 10, based on live Yu-Gi-Oh! market data.

What is a PSA 10 Gem-Knight Master Diamond (Platinum Secret Rare) worth?

A PSA 10 Gem-Knight Master Diamond (Platinum Secret Rare) sells for around $32, roughly 128× the ungraded price.

Where can I buy Gem-Knight Master Diamond (Platinum Secret Rare)?

You can buy Gem-Knight Master Diamond (Platinum Secret Rare) on TCGplayer, Cardmarket and eBay — see the live listings on this page. Always compare against the blended market value first.

What rarity is Gem-Knight Master Diamond (Platinum Secret Rare)?

Gem-Knight Master Diamond (Platinum Secret Rare) is a Platinum Secret Rare Yu-Gi-Oh! card from the Quarter Century Stampede set.

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Citation
Gem-Knight Master Diamond (Platinum Secret Rare) (Quarter Century Stampede #RA04-EN178) — Yu-Gi-Oh! market value $0.25, PSA 10 $32.08. Source: CardTrack, https://cardtrack.com/yugioh/card/quarter-century-stampede/gem-knight-master-diamond-platinum-secret-rare-ra04-en178
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<iframe src="https://cardtrack.com/embed/card?id=yugioh-quarter-century-stampede-gem-knight-master-diamond-platinum-secret-rare-platinum-secret-rare" width="100%" height="160" style="border:0;max-width:460px" title="Gem-Knight Master Diamond (Platinum Secret Rare) price — CardTrack" loading="lazy"></iframe> <p style="font:12px system-ui">Source: <a href="https://cardtrack.com">CardTrack</a></p>