The Shining Rayquaza (56 / 73) card can be found in the Shining Legends set.
Recently sold 40 times and based on those sales is worth around £24.08.
Currently, there are 7 open listings for this card on ebay.
This card sells in the range of £16.87 to £31.29, making it quite stable.
This Rare Shining card was illustrated by Naoki Saito.