Can I just check that I've got the stats right for this.
It's a website where people can go to find the right sports venue for them, all that it needs is some sports venues to advertise on it for said people to find.
"It's getting bigger and bigger by the day"
I can see 3 ads on there for sports venues, which according to your rates costs them £10 for 12 months.
So your site has brought in £30 (assuming they all paid and there's no freebies in there), requires substantial work to make anything of it since without advertisers it's useless, and you want £x,xxx for it?
Or is it earning money that isn't obvious, and if so how much?