Gem-Knight Aquamarine

Hidden Arsenal 5: Steelswarm Invasion (2011), Yu-Gi-Oh!, HA05-EN020, Secret Rare

PrintingUnlimited $0.781st Edition $1.29

1st Edition, Near Mint

$1.29

TCGplayer market price (an average of recent sales)

As of Oct 26 (yesterday). Unchanged since Oct 23.

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Price trend

For the 1st Edition printing.

Oct 19 $1.33 → Oct 26, 2026 $1.29 −3.0%

$1.33$1.30$1.32$1.29

Oct 19, 2026Oct 21, 2026Oct 22, 2026Oct 23, 2026Oct 26, 2026

Sep 26 $1.52 → Oct 26, 2026 $1.29 −15.1%

$1.52$1.40$1.29

Sep 26, 2026Oct 6, 2026Oct 11, 2026Oct 16, 2026Oct 26, 2026

Jul 28 $1.48 → Oct 26, 2026 $1.29 −12.8%

$1.59$1.40$1.50$1.29

Jul 28, 2026Aug 27, 2026Sep 11, 2026Sep 26, 2026Oct 26, 2026

Oct 26, 2025 $1.30 → Oct 26, 2026 $1.29 −0.8%

$1.67$1.40$1.50$1.60$1.29

Oct 26, 2025Feb 24, 2026Apr 26, 2026Jun 26, 2026Oct 26, 2026

Feb 8, 2024 $0.40 → Oct 26, 2026 $1.29 +223%

$1.67$0.39$1.00$1.50$1.29

Feb 8, 2024Jan 3, 2025Jun 17, 2025Nov 29, 2025Oct 26, 2026

Vs its set

Over the 90 days to Oct 26, 2026: the 1st Edition printing −12.8%; the median other card in Hidden Arsenal 5: Steelswarm Invasion 0.0% (59 other cards, each at its tracked printing). 56 of those 59 changed price, but no more than half rose and no more than half fell, so the middle change is 0%.

Market details

Record

Price history Feb 8, 2024 to Oct 26, 2026

Highest (1st Edition)$1.67first Jan 2, 2026 to Jan 7, 2026

Lowest (1st Edition)$0.39Feb 27, 2024 to Mar 1, 2024

Vs highest23% below $1.67

Price changes, last 30 days

Date	Price	Change
Oct 3	$1.52 → $1.47	−3.3%	Show on chart
Oct 7	$1.47 → $1.38	−6.1%	Show on chart
Oct 10	$1.38 → $1.34	−2.9%	Show on chart
Oct 12	$1.34 → $1.33	−0.7%	Show on chart
Oct 23	$1.33 → $1.29	−3.0%	Show on chart