XY - Steam Siege logo

STS · Pokémon

XY - Steam Siege

116 cards, led by Gardevoir EX (Secret) at $114.96.

Released Aug 3, 2016

Set index · STS

80.72

−19.28 (−19.28%)1Y

1W
−1.38%
1M
−4.04%
1Y
−19.28%
52W low 80.72high 100.27
Gardevoir EX (Secret)
M Gardevoir EX (Full Art)
Volcanion EX (Secret)
Gardevoir EX (Full Art)
M Steelix EX (Full Art)

The 5 most valuable · $28.20 – $114.96

Cards
116
Priced printings
209
Sales a week
273
Set value
$542.13
Popularity
44/100
Standing
#146

The index

A score that starts at 100 and moves with the set's fair value, compared on the same printings week to week.

One Near Mint copy of every printing at fair value; the chase cards move it most.

Master set value

one of every printing · fair value · Nov 13, 2026

NM
$542.13
209 of 209 priced · 100% from sales
LP
$342.78
209 of 209 priced · 100% from sales
MP
$268.31
209 of 209 priced · 100% from sales
HP
$213.67
209 of 209 priced · 100% from sales
DMG
$168.10
209 of 209 priced · 99% from sales

Near Mint was $665.17 on Aug 30, 2026 (-18.5%). Totals move when printings are added or first priced; the index above doesn't.

Sealed

Every way XY - Steam Siege was sold, priced.

22 products

* Standard MSRP for that product type, or a bundle's count × that price.

Cards

116 of 116 valued in Near Mint

In the set

116 singles tracked

  1. Common31 · 27%
  2. Uncommon30 · 26%
  3. Rare23 · 20%
  4. Ultra Rare14 · 12%
  5. Holo Rare9 · 8%
  6. Rare BREAK7 · 6%
  7. Secret Rare2 · 2%

How to read the set index

What is the set value?
What it costs to own one Near Mint copy of every printing in the set, at fair value. Fair value comes from real sales only; the marketplace's Market Price is shown on card pages but never counted.
What does the index line show?
The Set Value Index: one Near Mint copy of every printing at fair value, compared week to week on the same printings, so it moves with the set's value — the chase cards most. It starts at 100; the change beside the set value is that line over 30 days, or over 7 for a set too new for a month. Beside it, the set without the chases (every card counted the same) and the chases on their own.
How is popularity scored?
Out of 100, against the rest of the game: how much the set's cards sell for, how many of them sell each week, how many cards it holds and how its index has moved. It ranks sets; it isn't a price.