The Inexperienced Spy [1st Edition] #SDK-037
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The Inexperienced Spy [1st Edition] #SDK-037 collector guide
About The Inexperienced Spy
The Inexperienced Spy is a Normal Spell Card, printed as SDK-037 in Starter Deck: Kaiba (2002) as a Common. Starter Deck: Kaiba was one of the two pre-built decks that launched the English game in 2002, built around Seto Kaiba and his Blue-Eyes White Dragon. Ungraded, this printing ranks 48th of the 110 Starter Deck: Kaiba cards we track. The top card is Blue-Eyes White Dragon at €300.65.
Version and identification
This guide covers the 1st Edition printing. The words "1st Edition" are printed below the artwork on the left; copies without them are the Unlimited printing and usually sell for less. Check the code printed below the artwork on the right: it should read SDK-037. The code SDK-037, without a language letter, marks the original North American printing. European English copies have an E in the code, such as SDK-E037, and are priced separately. It is the Common version. Commons have a plain name and no foil. Starter Deck: Kaiba has 2 other printings of The Inexperienced Spy: SDK-037 (€0.14) and SDK-E034 (€2.56). Each has its own price, so match the code, edition and rarity exactly.
Price history
Today an ungraded copy of this printing sells for about €1.59, a PSA 9 for €35.67 and a PSA 10 for €42.80. Our monthly prices for it go back to December 2021. Over the last 12 months ungraded copies are up 21%, and flat in the last month. Its highest monthly ungraded value was €1.76 in June 2026, 10% above today. PSA 10 copies have moved up 113% over the same 12 months. Of the 3 printings of The Inexperienced Spy we track, this one ranks 2nd by ungraded value. The most valuable is Starter Deck: Kaiba SDK-E034 at €2.56. 1st Edition copies sell for about 11.4× the Unlimited printing (€1.59 against €0.14).
Grading and population
A PSA 10 sells for 26.9× the ungraded price and 1.2× a PSA 9. That gap is small, so grading fees may outweigh the gain unless the card is for your own collection. Early English Yu-Gi-Oh! cards often have off-centre cuts and wear on the dark brown back borders, which is why high grades are hard to reach.
Investment potential
In its favour: steady demand, with ungraded prices up 21% in a year; it comes from the 1st Edition run of an early English set, which will never be printed again; an active market (25 recent completed sales), so it is easy to sell. Past prices do not guarantee future ones. This is not financial advice.
Before you buy
Expect to pay around €1.59 for a clean ungraded copy; played copies sell for less, and a PSA 9 costs about €35.67. Ask the seller to show the code SDK-037, the "1st Edition" text and the Common finish clearly in the photos, as listing titles often mix up printings. Cards from 2002 often show white wear on the back edges and corners, so ask for photos of the back before you buy.
Card details and image from YGOPRODeck. Yu-Gi-Oh! is a trademark of Konami; Search Cards is not affiliated with Konami.
Most popular Starter Deck: Kaiba cards
How much is The Inexperienced Spy [1st Edition] #SDK-037 (Starter Deck: Kaiba) worth?
As of , an ungraded copy of The Inexperienced Spy [1st Edition] #SDK-037 from Starter Deck: Kaiba sells for about €1.59 (about $1.78), a PSA 9 for about €35.67 (about $40.00) and a PSA 10 for about €42.80 (about $48.00). These values are based on 25 recent completed sales, the latest on 9 Oct 2026. Ungraded values are up 21% over the last 12 months and PSA 10 values are up 113%. A PSA 10 sells for 26.9× the ungraded price.
Prices are market values from completed sales, shown in euros (converted from US dollars) and updated every few hours.
The Inexperienced Spy [1st Edition] #SDK-037 FAQ
How much is The Inexperienced Spy [1st Edition] #SDK-037 (Starter Deck: Kaiba) worth?
Ungraded, The Inexperienced Spy [1st Edition] #SDK-037 (Starter Deck: Kaiba) is worth about €1.59 (about $1.78). A PSA 9 sells for about €35.67 (about $40.00). A PSA 10 sells for about €42.80 (about $48.00). Based on recent completed sales as of 23 Oct 2026.
What is a PSA 10 The Inexperienced Spy [1st Edition] #SDK-037 worth?
A PSA 10 Gem Mint The Inexperienced Spy [1st Edition] #SDK-037 (Starter Deck: Kaiba) recently sold for about €42.80 (about $48.00), up 113% over the last 12 months. Its highest monthly PSA 10 value was €71.25 in May 2023.
Is The Inexperienced Spy [1st Edition] #SDK-037 (Starter Deck: Kaiba) worth grading?
A PSA 10 sells for about 26.9× the ungraded price (€42.80 vs €1.59). The gap is small, so grading fees may outweigh the gain for most copies.
Is The Inexperienced Spy [1st Edition] #SDK-037 (Starter Deck: Kaiba) going up in value?
Ungraded The Inexperienced Spy [1st Edition] #SDK-037 values are up 21% over the last 12 months and unchanged over the last month. The highest monthly ungraded value was €1.76 in June 2026.
When was The Inexperienced Spy [1st Edition] #SDK-037 (Starter Deck: Kaiba) released?
The Inexperienced Spy [1st Edition] #SDK-037 was released on March 29, 2002 as part of Starter Deck: Kaiba.