Structure Deck: Machine Reactor
80 cards at daily TCGplayer market prices · as of Sep 3, 2026
Activity
Mischief of the Gnomes (Unlimited) made the set's biggest move, +173% to $8.51. 12 cards broke away from the set's shared move over the 28-day window, in the typical range for Yu-Gi-Oh! sets (15.0 per 100 cards vs. a 23.8 median). 6 moved up, 6 moved down.
Most valuable printings
TCGplayer market price · Sep 3, 2026
Highest current market prices across this set's printings. Tap a card to view it on TCGplayer (affiliate).
How Yu-Gi-Oh! sets usually behave
Value concentrates hard: across 481 measured Yu-Gi-Oh! sets, the single top card typically holds about 13% of a set's total card value.
New Yu-Gi-Oh! sets have typically settled about 47% below their release-week price, with most of that easing done within roughly 13 weeks (measured across 49 recent releases).
Over the first 30 weeks after release, that easing runs about 28% deeper than the market's own drift.
Across 71,958 measured breakaway moves in our archive, upward moves outnumber drops about 1.5 to 1.
Named moves in this set
The set's largest single-card departures from its own shared move, across the tracked archive (since Feb 2024).
- +173%
Mischief of the Gnomes (Unlimited)to $8.51 Dec 8, 2025 - -56%
Ancient Gear Fortress (1st Edition)to $6.98 May 5, 2025 - -50%
Maxx "C" (Unlimited)to $7.82 Aug 12, 2024 - +98%Ancient Gear Fortress (Unlimited)to $24.34 May 6, 2024
- -45%Maxx "C" (1st Edition)to $5.81 Mar 24, 2025
- +52%
Ancient Gear Wyvern (1st Edition)to $4.90 May 20, 2024 - -30%
Ancient Gear Catapult (Unlimited)to $3.55 Jan 26, 2026 - +40%Ancient Gear Wyvern (Unlimited)to $7.13 Mar 24, 2025
- +36%Ancient Gear Catapult (1st Edition)to $5.29 Dec 16, 2024
- -22%
Ancient Gear Reactor Dragon (Unlimited)to $3.10 Sep 29, 2025 - +27%
Galaxy Cyclone (Unlimited)one active weekto $4.25 Aug 31, 2026 - -15%
Ancient Gear Gadjiltron Dragon (1st Edition)to $3.00 Jun 17, 2024
“One active week” means the daily market price changed in only one week of the move window. A single-week jump on an otherwise flat quote can be a stale price rather than a sustained move.
More Yu-Gi-Oh! sets
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Source: daily TCGplayer market prices. Sets with live listing pages carry those separately, this page never mixes the two.