Hello! You gave me a link to BIG BOX version of Heroes of Might and Magic 2.
As far as I know there was no Jumbo or regular steelbook of HoMM V.
However there were both a Jumbo and regular steel of HoMM VI, so you are probably talking about VI
Jumbo of HoMM VI is not top priority for me right now. But I would definitely be interested in a brand new sealed copy of HoMM II or HoMM II: Gold