The Mew Star (101 / 101) card can be found in the Dragon Frontiers set.
Recently sold 9 times and based on those sales is worth around £300.00.
Currently, there are 5 open listings for this card on ebay.
This card sells in the range of £174.76 to £425.24, making it highly volatile.
This Rare Holo Star card was illustrated by Masakazu Fukuda.