Every Cobalion card we price, most valuable first. Prices are what copies actually sold for, updated daily.
What a Cobalion card is worth
The most valuable Cobalion on this list is Cobalion (100 Full Art) from Noble Victories at $66.03£49.70€58.15, and the 25 priced copies across 15 sets are worth $229£172€202 together. Most of that sits in a handful of printings: the older the set and the scarcer the print run, the wider the gap to the rest.
Cobalion is printed in Japanese as well: 23 cards across 14 sets, the most valuable of them Cobalion from Red Collection at $99.99£75.26€88.06. Switch the list above to Japanese to read those, or to Both to rank the two catalogues against each other.
The highest PSA 10 on record for Cobalion sold for $1,250£940.81€1,101. reverse holo printings are priced separately from the standard card, because they do not trade at the same money. Rarities here include Illustration Rare, Secret Rare.
If you are trying to identify which Cobalion you have, the set name is printed on the card and the collector number sits in the bottom corner. Open the card here and the page carries every printing of it, the graded prices, and whether grading the copy is worth the fee. Sets to start with: Noble Victories, Plasma Storm, Black Bolt.