The Celebi (145 / 144) card can be found in the Skyridge set.
Recently sold 3 times and based on those sales is worth around £185.00.
Currently, there are 4 open listings for this card on ebay.
This card sells in the range of £87.94 to £282.06, making it highly volatile.
This Rare Secret card was illustrated by Mitsuhiro Arita.