Polymerization [Platinum Secret Rare] #RA03-EN051
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Polymerization [Platinum Secret Rare] #RA03-EN051 collector guide
About Polymerization
Polymerization is a Normal Spell Card, printed as RA03-EN051 in Quarter Century Bonanza (2024) as a Platinum Secret Rare. 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 239th of the 968 Quarter Century Bonanza cards we track. The top card is Blue-Eyes White Dragon at €192.99.
Character and collecting appeal
Blue-Eyes Abyss Dragon, Elder Entity N'tss, Gladiator Beast Gyzarus and Guardian Chimera mention Polymerization in their text, among other cards, which keeps it relevant.
Version and identification
Check the code printed below the artwork on the right: it should read RA03-EN051. RA03-EN051 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 Platinum Secret Rare version. Platinum Secret Rares are a newer Secret Rare variant with a platinum-coloured finish. Quarter Century Bonanza has 6 other printings of Polymerization: RA03-EN051 Collector's Rare (€4.40), RA03-EN051 Quarter Century Secret Rare (€8.07), RA03-EN051 Secret Rare (€3.35), RA03-EN051 Super Rare (€0.52), RA03-EN051 Ultimate Rare (€3.14) and RA03-EN051 Ultra Rare (€0.67). Each has its own price, so match the code, edition and rarity exactly. It was also printed in Legend of Blue Eyes White Dragon and 25th Anniversary Rarity Collection II, which we track separately.
Price history
Today an ungraded copy of this printing sells for about €6.20, a PSA 9 for €22.29 and a PSA 10 for €62.41. Our monthly prices for it go back to November 2024. Over the last 12 months ungraded copies are up 76%, and up 38% in the last month. Its highest monthly ungraded value was €7.08 in May 2026, 12% above today. PSA 10 copies have moved sideways over the same 12 months. Of the 18 printings of Polymerization we track, this one ranks 5th by ungraded value. The most valuable is Legend of Blue Eyes White Dragon LOB-059 1st Edition at €72.35.
Grading and population
A PSA 10 sells for 10.1× the ungraded price and 2.8× a PSA 9. That gap is small, so grading fees may outweigh the gain unless the card is for your own collection. Even pack-fresh modern cards can have surface scratches or curling foil, so a 10 is never guaranteed.
Investment potential
In its favour: steady demand, with ungraded prices up 76% in a year; an active market (27 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 2 other sets, which keep playable copies easy to find. Treat this as background, not a prediction or financial advice.
Before you buy
Expect to pay around €6.20 for a clean ungraded copy; played copies sell for less, and a PSA 9 costs about €22.29. Ask the seller to show the code RA03-EN051 and the Platinum 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 Polymerization [Platinum Secret Rare] #RA03-EN051 (Quarter Century Bonanza) worth?
As of , an ungraded copy of Polymerization [Platinum Secret Rare] #RA03-EN051 from Quarter Century Bonanza sells for about €6.20 (about $6.95), a PSA 9 for about €22.29 (about $25.00) and a PSA 10 for about €62.41 (about $69.99). These values are based on 27 recent completed sales, the latest on 12 Oct 2026. Ungraded values are up 76% over the last 12 months and PSA 10 values are unchanged. A PSA 10 sells for 10.1× the ungraded price.
Prices are market values from completed sales, shown in euros (converted from US dollars) and updated every few hours.
Polymerization [Platinum Secret Rare] #RA03-EN051 FAQ
How much is Polymerization [Platinum Secret Rare] #RA03-EN051 (Quarter Century Bonanza) worth?
Ungraded, Polymerization [Platinum Secret Rare] #RA03-EN051 (Quarter Century Bonanza) is worth about €6.20 (about $6.95). A PSA 9 sells for about €22.29 (about $25.00). A PSA 10 sells for about €62.41 (about $69.99). Based on recent completed sales as of 23 Oct 2026.
What is a PSA 10 Polymerization [Platinum Secret Rare] #RA03-EN051 worth?
A PSA 10 Gem Mint Polymerization [Platinum Secret Rare] #RA03-EN051 (Quarter Century Bonanza) recently sold for about €62.41 (about $69.99), unchanged over the last 12 months. Its highest monthly PSA 10 value was €62.42 in March 2025.
Is Polymerization [Platinum Secret Rare] #RA03-EN051 (Quarter Century Bonanza) worth grading?
A PSA 10 sells for about 10.1× the ungraded price (€62.41 vs €6.20). The gap is small, so grading fees may outweigh the gain for most copies.
Is Polymerization [Platinum Secret Rare] #RA03-EN051 (Quarter Century Bonanza) going up in value?
Ungraded Polymerization [Platinum Secret Rare] #RA03-EN051 values are up 76% over the last 12 months and up 38% over the last month. The highest monthly ungraded value was €7.08 in May 2026.
When was Polymerization [Platinum Secret Rare] #RA03-EN051 (Quarter Century Bonanza) released?
Polymerization [Platinum Secret Rare] #RA03-EN051 was released on November 7, 2024 as part of Quarter Century Bonanza.