Gem-Knight Master Diamond (Quarter Century Secret Rare) YU-GI-OH
Also known as Gem-Knight Master Diamond QCSR
Gem-Knight Master Diamond (Quarter Century Secret Rare) #RA04-EN178 (Quarter Century Stampede) is worth about $3.47 today, the TCGplayer market price for any condition as of 2026-10-28, down 8% over 30 days.
This card has 2 printings (TCGplayer market, 2026-10-28): Quarter Century Secret Rare $3.47 (this page), Platinum Secret Rare $0.27.
price trend and the high since we began tracking: more ↓less ↑
Gem-Knight Master Diamond (Quarter Century Secret Rare) #RA04-EN178 is trending down: $3.47 today, down 8% in 30 days and 8% below its high of $3.78 (2026-09-21), the highest since we began tracking (2026-09-16), but near its low of $3.47 (2026-10-27). TCGplayer market price as of 2026-10-28, tracked daily since 2026-09-16. chart →
Price data for your app or store: API and daily history since 2024 · CSV download
WORTH GRADING?
WHERE TO BUY AND SELL
1st Edition · eBay scanned Sep 25show the work →
| TCGplayer market | $3.47 | verify ↗ |
| TCGplayer lowest ask | $2.50 | |
| eBay delivered floor (scanned 33d ago) | $2.00 | the listing ↗ |
GAME DATA[ + ] SHOW[ × ] HIDE
- ATTACK
- 2900
- DEFENSE
- 2500
- ATTRIBUTE
- EARTH
- CARD TYPE
- Fusion/Effect Monster
- DESCRIPTION
- 3 "Gem-Knight" monsters Must first be Fusion Summoned. This card gains 100 ATK for each "Gem-" monster in your Graveyard. Once per turn: You can banish 1 Level 7 or lower "Gem-Knight" Fusion Monster from your Graveyard; until the End Phase, this card's name becomes that monster's, and replace this effect with that monster's original effects.
- MONSTERTYPE
- Rock
MORE FROM QUARTER CENTURY STAMPEDE
FULL SET →
PRICE FAQ
What would a card shop pay for Gem-Knight Master Diamond (Quarter Century Secret Rare)?
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Shops and show vendors commonly offer about 70% of market in cash and 80% in store credit. At today's $3.47 market price that is roughly $2.43 cash or $2.78 trade for a near-mint copy. Selling it yourself on TCGplayer or eBay nets more after fees; see the seller-net answer below.
What is Gem-Knight Master Diamond (Quarter Century Secret Rare) (Quarter Century Stampede) worth today?
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Gem-Knight Master Diamond (Quarter Century Secret Rare) [1st Edition] has a TCGplayer market price of $3.47 as of 2026-10-28.
Is Gem-Knight Master Diamond (Quarter Century Secret Rare) going up or down in price?
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Gem-Knight Master Diamond (Quarter Century Secret Rare) #RA04-EN178 is trending down: $3.47 today, down 8% in 30 days and 8% below its high of $3.78 (2026-09-21), the highest since we began tracking (2026-09-16), but near its low of $3.47 (2026-10-27). TCGplayer market price as of 2026-10-28, tracked daily since 2026-09-16. Other windows: down 1.4% over 7 days.
What is the highest price for Gem-Knight Master Diamond (Quarter Century Secret Rare) since TickerMint began tracking?
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TickerMint began tracking Yu-Gi-Oh prices on 2026-09-16, after Gem-Knight Master Diamond (Quarter Century Secret Rare) came out, so these are the highest and lowest prices since we began tracking (2026-09-16), not all-time records. In TickerMint's daily data (since September 2026), the TCGplayer market price for Gem-Knight Master Diamond (Quarter Century Secret Rare) [1st Edition] (all conditions) peaked at $3.78 (2026-09-21) and bottomed at $3.47 (2026-10-27).
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