The Venusaur (13 / 53) card can be found in the Wizards Black Star Promos set.
Recently sold 10 times and based on those sales is worth around £51.22.
Currently, there are 19 open listings for this card on ebay.
This card sells in the range of £3.67 to £98.77, making it highly volatile.
This Promo card was illustrated by Ken Sugimori.