The vendor's catalog photograph of Steam Siege Booster Pack. It identifies the product; it is not evidence of condition, of what is inside, or of any price on this page.
Steam Siege Booster Pack
Steam Siege Booster PackEvery price, print and shelf reading on this page belongs to this one sealed product.
∅Illiquid / UnknownIlliquid / UnknownThe classifier refused to call one: too little liquidity or too small a sample to test any rule. The absence of a read, never a tenth regime.
1D
-1.8%
7D
+1.5%
30D
+5.1%
Steam Siege Booster Pack guide
Product type, set and release date, chase cards, price history and how it compares with the XY era.
modelled guide price, not a confirmed sale, as of Nov 5, 2026
Rank among booster packs in XY
26th of 26
Steam Siege is an XY-era expansion for the English-language Pokémon TCG, released on August 3, 2016, and the Steam Siege Booster Pack is the basic way to open it. A booster pack is a sealed pack of randomized cards from the set, meant for opening and building a collection rather than for playing from a ready-made deck. The set lists 114 official cards and has 25 sealed products in total, spanning packs, boxes, a case, tins, blisters and decks, so the single pack is one entry point into a wide product line.
Steam Siege chase cards
Steam Siege is opened mainly for its Gardevoir EX cards and the Mega evolution that goes with them. The most valuable card is the Secret Rare Gardevoir EX, followed by the Ultra Rare M Gardevoir EX, the Secret Rare Volcanion EX, the Ultra Rare M Steelix EX and a second Ultra Rare Gardevoir EX. The set carries 23 chase-tier cards, and its two secret rares sit above the official count of 114. Value is concentrated: the five top cards make up 60 percent of the set's total card value, and a Steam Siege Booster Pack can yield any of them.
As of October 23, 2026, the Steam Siege Booster Pack has only been tracked since September 2026, so the record is short. Over the past 30 days it is up 5 percent, and it sits 7 percent above its tracked low from September 2026. The figures rest on a modelled market guide rather than a run of confirmed recent sales, which suits a pack that trades in small, steady increments. A window this brief says little about longer trends, and the one-month gain is the clearest signal available.
Since tracking began (Sep 2026)+4.3%
30 days+5.1%
Tracked high$44.77 · Oct 17, 2026
Tracked low$29.77 · Sep 15, 2026
Written from market data as of October 24, 2026; the tables update live.
How Steam Siege Booster Pack compares
Among the 26 XY-era booster packs, the Steam Siege Booster Pack ranks 26th by price, at about 0.4 times the era median. The neighboring sets' equivalents both price higher: the XY Fates Collide Booster Pack before it and the Evolutions Booster Pack after it. Within its own set the pack ranks 9th by price of 11 priced products, and the highest-priced is the Steam Siege Elite Trainer Box. In practice, the single pack is the lowest-priced booster pack in the era and sits toward the lower end of the Steam Siege line.
Mkt Price$33.33The venue’s modelled daily market guide for this product — a model of where it is trading, not a confirmed sale. No per-transaction sealed tape is collected, so no day here closes on a print.
Vs MSRPN/A
Vs MSRPN/ANo MSRP assertion is on file for this product, so there is nothing to compare the market against.
30D Vol
35units▲+52.2%
units · vs prior 30d
30D Vol35 units35 units sold, from the venue's own sold-units ledger, over the last 30 days, against 23 in the 30 days before.
Per PackN/A
Per PackN/AWithheld: a per-pack price needs a pack count we KNOW rather than infer, and no pack-math source is on file for this product. Dividing by a guessed count would make a fabricated price.
One candle per UTC day — the finest grain this market recordsOne candle per ISO week (Mon–Sun), rolled up from the daily barsOne candle per calendar month, rolled up from the daily bars
How each period is drawn. Candles and bars show the full observed open/high/low/close; line and area show the close alone. The DATA does not change with the mark.
Price scale (linear, log or percent), auto-scaling, and the note on exactly how these bars were built.
Expand the chart to the whole viewport. Same bars and same drawings — only the room they get changes.
Cursor — chart crosshair, pan and zoomTrend line — two pointsHorizontal line — one click, priced at the axisRay — two points, extended forwardZone — two cornersFibonacci retracement — anchor the move, start to endNote — click, then typeMeasure — drag for change, percent and barsMagnet — snap each new anchor to the nearest bar's open, high, low or close, so a line lands on an observation rather than between two of them.Nothing to clear — there are no drawings on this card.DRW
•WatchA research classification, not advice: the engine's floor read at 65% confidence, on a illiquid unknown regime.
floor thesis · 30-120d horizon · 65% confidence on 18/100 data quality
Scenarios
ILLIQUID_UNKNOWN persists near current levels (non-probabilistic range -- data quality too thin to assign probabilities).rangeBASE · rangeILLIQUID_UNKNOWN persists near current levels (non-probabilistic range -- data quality too thin to assign probabilities).Evidence corroborates faster than expected, accelerating the thesis (non-probabilistic range).rangeBULL · rangeEvidence corroborates faster than expected, accelerating the thesis (non-probabilistic range).Evidence reverses sooner than expected, invalidating the thesis (non-probabilistic range).rangeBEAR · rangeEvidence reverses sooner than expected, invalidating the thesis (non-probabilistic range).
Steam Siege Elite Trainer Box$1,800.00—$1,800.00Steam Siege Elite Trainer Box — the provider's modelled daily market guide on 2026-11-05, which stood in because no sale was observed that day. A model of where it trades, not a trade.Steam Siege Booster Box
Quant Score
Quant score 68.2 out of 10068.2/100
Composite over the 4 inputs that resolved.
Price trend100Price trend100/100Where the price has gone over the scoring window, scaled 0-100. Higher is a stronger uptrend; 0 is the bottom of the observed range, not "no data".Liquidity54Liquidity54/100How readily the thing trades — observed venue depth and the pace it sells at. Higher is more liquid.
EvidenceEvidenceWhat kind of fact this row is. A completed sale, a live ask and a calculated guide price are three different weights of evidence about the same number, and this column is the difference between them.
ObservedObservedThe day the fact was read — not the day the underlying event happened, and not today. An old date is an old reading.
AgeAgeHow long ago this row was read, as of the moment the page was computed.
ConfidenceConfidenceHow much weight this row carries where it feeds a model, from the resolver that matched it. Lower means a looser match or a thinner source, and a low-confidence row is reweighted rather than dropped.
ModelledModelledYes = a CALCULATED value (a guide price, an estimate); No = something actually observed (a sale, a listing, a census count). A modelled row is evidence about a model, not about the market.
Live askA copy offered for sale right now. An ask is what a seller wants, not what anyone paid — it bounds the price from above until it clears.
Nov 5, 2026
20h
90%
No
Price statisticAn observed figure computed over several rows rather than one print — a delivered floor, a published median over a window.
Nov 5, 2026
20h
90%
No
Guide priceA calculated market guide — a model of where the product is trading. Never a confirmed sale, and always marked Modelled.
Nov 5, 2026
1d
90%
Yes
Confirmed saleA completed transaction at a known price — the strongest evidence on this page. Prices are delivered (item + required shipping).
Nov 4, 2026
2d
85%
No
Sealed productWhat every row above was gathered for — one printing, in this one finish and condition or grade. Change either switcher in the header and you are reading a different one; the page's own URL is the address of exactly this one.pq-quant-2026.10.0The version of the scoring and analytics formulas that produced everything on this page. Two figures computed under different versions are not comparable, which is why the version is stated rather than assumed.
$1,436.99
—
$1,436.99Steam Siege Booster Box — the provider's modelled daily market guide on 2026-11-05, which stood in because no sale was observed that day. A model of where it trades, not a trade.
Mega Gyarados Collection Box$644.46—$644.46Mega Gyarados Collection Box — the provider's modelled daily market guide on 2026-10-20, which stood in because no sale was observed that day. A model of where it trades, not a trade.
Battle Arena Decks: Keldeo EX vs Rayquaza EX$288.06—$288.06Battle Arena Decks: Keldeo EX vs Rayquaza EX — the provider's modelled daily market guide on 2026-11-05, which stood in because no sale was observed that day. A model of where it trades, not a trade.
Steam Siege Sleeved Booster Pack Art Bundle [Set of 4]$132.50—$132.50Steam Siege Sleeved Booster Pack Art Bundle [Set of 4] — the provider's modelled daily market guide on 2026-11-05, which stood in because no sale was observed that day. A model of where it trades, not a trade.
Steam Siege Single Pack Blister [Lucario]$63.78—$63.78Steam Siege Single Pack Blister [Lucario] — the provider's modelled daily market guide on 2026-10-22, which stood in because no sale was observed that day. A model of where it trades, not a trade.
Steam Siege Single Pack Blister [Floette]$37.32—$37.32Steam Siege Single Pack Blister [Floette] — the provider's modelled daily market guide on 2026-11-05, which stood in because no sale was observed that day. A model of where it trades, not a trade.
XY Steam Siege Sleeved Booster Pack$36.49—$36.49XY Steam Siege Sleeved Booster Pack — the provider's modelled daily market guide on 2026-11-05, which stood in because no sale was observed that day. A model of where it trades, not a trade.
Steam Siege Booster Pack$33.33—$33.33Steam Siege Booster Pack — the provider's modelled daily market guide on 2026-11-05, which stood in because no sale was observed that day. A model of where it trades, not a trade.
Steam Siege Theme Deck - "Ring of Lightning" [Hoopa]$22.91—$22.91Steam Siege Theme Deck - "Ring of Lightning" [Hoopa] — the provider's modelled daily market guide on 2026-11-05, which stood in because no sale was observed that day. A model of where it trades, not a trade.
Steam Siege Theme Deck - "Gears of Fire" [Volcanion]$21.09—$21.09Steam Siege Theme Deck - "Gears of Fire" [Volcanion] — the provider's modelled daily market guide on 2026-11-05, which stood in because no sale was observed that day. A model of where it trades, not a trade.
Battle Heart Tin [Magearna EX]———Battle Heart Tin [Magearna EX] — the set has it and no priced daily bar exists for it yet. A dash, never a zero.
Battle Heart Tin [Pikachu EX]———Battle Heart Tin [Pikachu EX] — the set has it and no priced daily bar exists for it yet. A dash, never a zero.
Battle Heart Tin [Volcanion EX]———Battle Heart Tin [Volcanion EX] — the set has it and no priced daily bar exists for it yet. A dash, never a zero.
Hoopa EX Challenge Box———Hoopa EX Challenge Box — the set has it and no priced daily bar exists for it yet. A dash, never a zero.
Legendary Battle Decks [Articuno]———Legendary Battle Decks [Articuno] — the set has it and no priced daily bar exists for it yet. A dash, never a zero.
Legendary Battle Decks [Moltres]———Legendary Battle Decks [Moltres] — the set has it and no priced daily bar exists for it yet. A dash, never a zero.
Legendary Battle Decks [Set of 3]———Legendary Battle Decks [Set of 3] — the set has it and no priced daily bar exists for it yet. A dash, never a zero.
Legendary Battle Decks [Zapdos]———Legendary Battle Decks [Zapdos] — the set has it and no priced daily bar exists for it yet. A dash, never a zero.
Steam Siege 3 Pack Blister [Azelf]———Steam Siege 3 Pack Blister [Azelf] — the set has it and no priced daily bar exists for it yet. A dash, never a zero.
Steam Siege 3 Pack Blister [Rayquaza]———Steam Siege 3 Pack Blister [Rayquaza] — the set has it and no priced daily bar exists for it yet. A dash, never a zero.
Steam Siege Elite Trainer Box Case———Steam Siege Elite Trainer Box Case — the set has it and no priced daily bar exists for it yet. A dash, never a zero.
Steam Siege Sleeved Booster Case———Steam Siege Sleeved Booster Case — the set has it and no priced daily bar exists for it yet. A dash, never a zero.
Method▾
Every price is that product’s newest stored daily bar, picked by the same precedence the chart above uses — a real observed sale beats a modelled guide, and the guide stands in only on days with no sale. Per-pack divides by the PUBLISHED pack count and is withheld wherever that count is not on file, because a guessed denominator makes a fabricated price. Products the set has but we cannot price keep their row, with a dash.
Relative strength
69
Relative strength69/100This instrument against its comparison universe. Higher is outperformance. Sealed product has no scored peer universe today.
Data quality18Data quality18/100How much of the evidence the other scores wanted actually resolved. Higher is better covered. It is the one score that is honest about the rest.
5 inputs have no sealed evidence and were reweighted away: supply tightness, absorption, auction demand, grading reflexivity, reprint / supply risk.
Method▾
Scored over a 30-day window on a sample of 51, formula pq-quant-2026.10.0. The packet reweighted 5 missing inputs away and applied a 28% confidence penalty for them: supplyTightness, absorption, auctionDemand, gradingReflexivity, reprintSupplyRisk.
Price trend100
Supply tightnessN/A
AbsorptionN/A
Auction demandN/A
Liquidity54
Grading reflexivityN/A
Relative strength69
Reprint / supply riskN/A
Data quality18
Inventory countHow many copies and listings stand on the book. What depth, supply and absorption are measured against.
Nov 5, 2026
20h
70%
No
Live Listings
Pricevs MktQtyCond
TCGplayer0
eBay0
Retail availability
No retailer is tracked for this product yet, which is not the same as it being sold out.
In stock near you
Enter a ZIP code or pick a metro to see collector reports near you.
No wholesale listings seen for this product as of the last catalogue read on 2026-11-05.
Wholesale / pack
—
No wholesale listing is matched to this product.
Market guide / pack
—
Withheld: no published pack count is on file for this product, and a per-pack figure over a guessed count would be a fabricated price.
Shelf / pack
—
Withheld: no tracked retailer had this in stock on its last reading.
No wholesale listings seen for this product as of the last catalogue read on 2026-11-05.
A wholesale ask is a distributor’s price for a whole lot — freight, minimums and any trade terms sit behind it — and is not a price a single box trades at. Links go to the distributor’s own page; nothing here is an affiliate link. Per-pack figures divide the lot price by the pack count the distributor published, never by a guessed one.
Set supply
▼Low7 lots listed on 2026-11-05 — higher than 51% of the set's own readings over 51 readings in 90 days.
7 lots listed on 2026-11-05 — higher than 51% of the set's own readings over 51 readings in 90 days.
Lots listed7±0Distinct bulk listings of this set across every distributor catalogue we read, on the latest reading. The 30-day change is against the last reading at least thirty days earlier.Packs on hand—Packs implied by each listing multiplied by the quantity the distributor's own cart accepts — the warehouse depth the page publishes. Withheld when no listing states both numbers.Cheapest / packCA$11.11 CAD±0The cheapest per-pack asking price across the set’s listings, in the currency the distributor quotes. Never converted.
Thin on the wholesale shelf: fresh-pack supply is not what is pressuring Steam Siege's raw NM singles right now.
4 distributors’ public catalogues are a proxy for supply, not the print run.
The vendor's catalog photograph of Steam Siege Booster Pack. It identifies the product; it is not evidence of condition, of what is inside, or of any price on this page.