Every Glastrier card we price, most valuable first. Prices are what copies actually sold for, updated daily.
What a Glastrier card is worth
The most valuable Glastrier on this list is Glastrier (Holiday Calendar) from Miscellaneous Cards & Products at $0.46£0.35€0.41, and the 5 priced copies across 3 sets are worth $2£1€1 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.
Glastrier is printed in Japanese as well: 4 cards across 2 sets, the most valuable of them Glastrier (Energy Symbol Pattern) from High Class Pack: MEGA Dream ex at $0.84£0.63€0.74. Switch the list above to Japanese to read those, or to Both to rank the two catalogues against each other.
reverse holo printings are priced separately from the standard card, because they do not trade at the same money.
If you are trying to identify which Glastrier 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: Miscellaneous Cards & Products, Lost Origin, Ascended Heroes.