The Omanyte (57 / 110) card can be found in the Legendary Collection set.
Recently sold 6 times and based on those sales is worth around £29.84.
Currently, there are 4 open listings for this card on ebay.
This card sells in the range of £18.91 to £40.77, making it quite volatile.
This Uncommon card was illustrated by Kagemaru Himeno.