The Rattata (66 / 108) card can be found in the Evolutions set.
Recently sold 1 times and based on those sales is worth around £0.85.
Currently, there are 13 open listings for this card on ebay.
This card sells in the range of £0.85 to £0.85, making it very stable.
This Common card was illustrated by Mitsuhiro Arita.