The Ho-Oh Legend (112 / 123) card can be found in the Heartgold and Soulsilver set.
Recently sold 16 times and based on those sales is worth around £20.58.
Currently, there are 12 open listings for this card on ebay.
This card sells in the range of £7.86 to £33.30, making it quite volatile.
This Legend card was illustrated by Shinji Higuchi.