If I was offered £500 for it I'd take it, as I think you could wait years on this 'perfect end user' and he's never going to arrive.
I don't think its viable to setup a business to compete with Wordpress today. Even if someone did try and set up to compete, they likely wouldn't want to restrict themselves to UK only either would they.
Google has killed off the 'directories' business model. Perhaps several years ago you could have built up some page rank and sold listings to blogs for £50. Thats a no go now.
What else can you actually do with it ?