Gravekeeper's Spy [Quarter Century Secret Rare] #RA03-EN121
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Gravekeeper's Spy [Quarter Century Secret Rare] #RA03-EN121 collector guide
About Gravekeeper's Spy
Gravekeeper's Spy is a Flip Effect Monster, whose effect happens when it is flipped face-up, printed as RA03-EN121 in Quarter Century Bonanza (2024) as a Quarter Century Secret Rare. It is a Level 4 DARK Spellcaster monster with 1,200 ATK and 2,000 DEF. Quarter Century Bonanza, released in late 2024, mixes classic cards from the original series with modern staples, each in several rarities including Quarter Century Secret Rare and Platinum Secret Rare. Ungraded, this printing ranks 66th of the 968 Quarter Century Bonanza cards we track. The top card is Blue-Eyes White Dragon at €192.99.
Character and collecting appeal
Gravekeeper's monsters guard the Pharaoh's tomb and are built around the Field Spell Necrovalley. Its text is about Special Summoning.
Version and identification
Check the code printed below the artwork on the right: it should read RA03-EN121. RA03-EN121 is the English printing. Other languages use their own letters in place of EN, such as DE or FR, and are priced separately. It is the Quarter Century Secret Rare version. Quarter Century Secret Rares were introduced for the game's 25th anniversary. Quarter Century Bonanza has one other printing of Gravekeeper's Spy: RA03-EN121 Platinum Secret Rare (€4.46). Each has its own price, so match the code, edition and rarity exactly. It was also printed in Pharaonic Guardian, which we track separately.
Price history
Today an ungraded copy of this printing sells for about €24.73, a PSA 9 for €124.04 and a PSA 10 for €171.62. Our monthly prices for it go back to November 2024. Over the last 12 months ungraded copies are up 174%, and down 2% in the last month. The current price is its high point on our records. PSA 10 copies have moved up 69% over the same 12 months. Of the 4 printings of Gravekeeper's Spy we track, this is the most valuable ungraded. The cheapest is Quarter Century Bonanza RA03-EN121 Platinum Secret Rare at €4.46.
Grading and population
A PSA 10 sells for 6.9× the ungraded price and 1.4× a PSA 9. That gap is big enough that grading a sharp, well-centred copy can pay for itself. Modern foils can leave the pack with scratches, print lines or a slight curl, so even fresh copies do not always reach a 10.
Investment potential
In its favour: steady demand, with ungraded prices up 174% in a year; an active market (25 recent completed sales), so it is easy to sell. Against it: large modern print runs, which tend to cap prices unless a card becomes iconic; reprints in another set, which keep playable copies easy to find. Card prices can fall as well as rise, so this is not financial advice.
Before you buy
Expect to pay around €24.73 for a clean ungraded copy; played copies sell for less, and a PSA 9 costs about €124.04. Ask the seller to show the code RA03-EN121 and the Quarter Century Secret Rare finish clearly in the photos, as listing titles often mix up printings. Modern foils can be scratched or curled straight from the pack, so check the surface under a light if you plan to grade.
Card details and image from YGOPRODeck. Yu-Gi-Oh! is a trademark of Konami; Search Cards is not affiliated with Konami.
Most popular Quarter Century Bonanza cards
How much is Gravekeeper's Spy [Quarter Century Secret Rare] #RA03-EN121 (Quarter Century Bonanza) worth?
As of , an ungraded copy of Gravekeeper's Spy [Quarter Century Secret Rare] #RA03-EN121 from Quarter Century Bonanza sells for about €24.73 (about $27.73), a PSA 9 for about €124.04 (about $139.11) and a PSA 10 for about €171.62 (about $192.47). These values are based on 25 recent completed sales, the latest on 10 Oct 2026. Ungraded values are up 174% over the last 12 months and PSA 10 values are up 69%. A PSA 10 sells for 6.9× the ungraded price.
Prices are market values from completed sales, shown in euros (converted from US dollars) and updated every few hours.
Gravekeeper's Spy [Quarter Century Secret Rare] #RA03-EN121 FAQ
How much is Gravekeeper's Spy [Quarter Century Secret Rare] #RA03-EN121 (Quarter Century Bonanza) worth?
Ungraded, Gravekeeper's Spy [Quarter Century Secret Rare] #RA03-EN121 (Quarter Century Bonanza) is worth about €24.73 (about $27.73). A PSA 9 sells for about €124.04 (about $139.11). A PSA 10 sells for about €171.62 (about $192.47). Based on recent completed sales as of 23 Oct 2026.
What is a PSA 10 Gravekeeper's Spy [Quarter Century Secret Rare] #RA03-EN121 worth?
A PSA 10 Gem Mint Gravekeeper's Spy [Quarter Century Secret Rare] #RA03-EN121 (Quarter Century Bonanza) recently sold for about €171.62 (about $192.47), up 69% over the last 12 months. Its highest monthly PSA 10 value was €174.33 in September 2026.
Is Gravekeeper's Spy [Quarter Century Secret Rare] #RA03-EN121 (Quarter Century Bonanza) worth grading?
A PSA 10 sells for about 6.9× the ungraded price (€171.62 vs €24.73). The gap is large enough that grading a clean copy can pay off after fees.
Is Gravekeeper's Spy [Quarter Century Secret Rare] #RA03-EN121 (Quarter Century Bonanza) going up in value?
Ungraded Gravekeeper's Spy [Quarter Century Secret Rare] #RA03-EN121 values are up 174% over the last 12 months and down 2% over the last month. The highest monthly ungraded value was €25.31 in September 2026.
When was Gravekeeper's Spy [Quarter Century Secret Rare] #RA03-EN121 (Quarter Century Bonanza) released?
Gravekeeper's Spy [Quarter Century Secret Rare] #RA03-EN121 was released on November 7, 2024 as part of Quarter Century Bonanza.