Every Heliolisk card we price, most valuable first. Prices are what copies actually sold for, updated daily.
What a Heliolisk card is worth
The most valuable Heliolisk on this list is Heliolisk from XY Promos at $4.30£3.24€3.79, and the 20 priced copies across 15 sets are worth $17£13€15 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.
Heliolisk is printed in Japanese as well: 20 cards across 15 sets, the most valuable of them Heliolisk (Mirror Holofoil) from Start Deck 100 at $4.99£3.76€4.39. 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 Heliolisk sold for $100£75.26€88.07. reverse holo printings are priced separately from the standard card, because they do not trade at the same money. Rarities here include Illustration Rare.
If you are trying to identify which Heliolisk 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: XY Promos, Twilight Masquerade, Ascended Heroes.