Warning
I strongly reccomend that you scrap / delete / edit all reference to Leeds united football club, it will be seen as regging in bad faith, don't put any Leeds united football club content on the site with out Leeds united's written permission.
You just may lose your domain.
Don't approach them to sell, that can be seen as bad faith aswell, if they want it then they will come to you.
With out Leeds united merchandise being sold on the site then it's worth little, maybe £100