Every Grimsley card we price, most valuable first. Prices are what copies actually sold for, updated daily.
What a Grimsley card is worth
The most valuable Grimsley on this list is Grimsley (Full Art) from SM - Unified Minds at $11.28£8.49€9.93, and the 2 priced copies across 1 sets are worth $12£9€10 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.
Grimsley is printed in Japanese as well: 2 cards across 1 sets, the most valuable of them Grimsley from GG End at $12.84£9.66€11.31. 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 Grimsley sold for $80£60.21€70.45. 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 Grimsley 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: SM - Unified Minds.