The Mew (47 / 53) card can be found in the Wizards Black Star Promos set.
Recently sold 1 times and based on those sales is worth around £41.00.
Currently, there are 6 open listings for this card on ebay.
This card sells in the range of £41.00 to £41.00, making it very stable.
This Promo card was illustrated by Ken Sugimori.