Structure Deck: Machine Reactor
80 printings, priced daily from TCGplayer, as of Oct 17, 2026
Most valuable cards
TCGplayer market price, Oct 17, 2026
Highest current market prices across this set's printings. Tap a card to view it on TCGplayer (affiliate).
Break-aways
Mischief of the Gnomes (Unlimited) is this set's largest break-away, +173% beyond this set's move over the 28 days to the week of Dec 8, 2025, ending at $8.51. The set's own move over that window was +2.6%. 12 break-aways across this set's history; for its size, within 1.5x of the typical Yu-Gi-Oh! set. 6 moved up, 6 moved down.
Named moves in this set
Cards that moved furthest from the rest of this set, across the tracked archive (since Feb 2024). Ordered by size of departure, counting a drop and a rise of the same size as equal, so a drop can sit above a larger-looking rise.
- +173%
Mischief of the Gnomes (Unlimited)to $8.51 week of Dec 8, 2025 - −56%
Ancient Gear Fortress (1st Edition)to $6.98 week of May 5, 2025 - −50%
Maxx "C" (Unlimited)to $7.82 week of Aug 12, 2024 - +95%Ancient Gear Fortress (Unlimited)to $24.34 week of May 6, 2024
- −45%Maxx "C" (1st Edition)to $5.81 week of Mar 24, 2025
- +53%
Ancient Gear Wyvern (1st Edition)to $4.90 week of May 20, 2024 - −30%
Ancient Gear Catapult (Unlimited)to $3.55 week of Jan 26, 2026 - +40%Ancient Gear Wyvern (Unlimited)to $7.13 week of Mar 24, 2025
- +36%Ancient Gear Catapult (1st Edition)to $5.29 week of Dec 16, 2024
- −22%
Ancient Gear Reactor Dragon (Unlimited)to $3.10 week of Sep 29, 2025 - +25%
Galaxy Cyclone (Unlimited)one active weekto $4.25 week of Sep 7, 2026 - −15%
Ancient Gear Gadjiltron Dragon (1st Edition)to $3.00 week of 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.
How Yu-Gi-Oh! sets usually behave
Value concentrates hard: across the 487 Yu-Gi-Oh! sets we measured this on, the single top card typically holds about 13% of a set's total card value.
On average, a new Yu-Gi-Oh! set's cards worth $0.50 or more, weighted by price, are about 47% below the set's release-week level in weeks 26 to 30 (averaged over 39 to 40 of the sets released since February 8, 2024, when our price history starts, in each of weeks 26 to 30). About 30% of that drop came in the first week after release, 60% within about 5 weeks and 80% within about 11. The level was still falling over weeks 20 to 30, and week 30 is as far as we measure, so how far it falls is not known. A card's price change from one week to the next counts only when both of those prices are $0.50 or more. Single sets can land well away from that.
Counting each card's largest 4-week move relative to its set's average, across 74,293 cards, moves above the set outnumber moves below it about 1.5 to 1.
More Yu-Gi-Oh! sets
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Source: daily TCGplayer market prices.