Is the price of Steam Siege Mega Gyarados Collection Box going up or down?

The market price is up 3.9% over the last 30 days, as of Oct 26, 2026.

When was Steam Siege Mega Gyarados Collection Box released?

Steam Siege Mega Gyarados Collection Box was released on Aug 3, 2016, as part of Steam Siege.

What are the most valuable cards in Steam Siege?

By ungraded price, the top cards in Steam Siege are Gardevoir-EX 116/114 ($95.10), M Gardevoir-EX 112/114 ($50.00), Volcanion-EX 115/114 ($39.99).

How are sealed product prices set?

The price is TCGplayer's market price for one sealed unit, dated Oct 26, 2026. It is a single reading and is not blended with eBay listings or the StockX and Target readings, which are shown separately where we have them.

Steam Siege Mega Gyarados Collection Box

Collection · Released Aug 3, 2016

Steam Siege Mega Gyarados Collection Box price

$670up +3.9% 30 days

Market price, Oct 26, 2026. One sealed unit.

Steam Siege Mega Gyarados Collection Box currently sells for about $670 sealed. It is a collection from Steam Siege; see that page for what every card inside is worth.