I need a sales page written

I have a site which is getting a lot of traffic however conversion rate is very poor.

I need someone with experience of writing sales pages to write me a sales page.

All the traffic is down to SEO so I need someone who has experience in SEO as I don't want these changes to affect my rankings.

If you can do this please PM. You must be able to have some kind of track record etc.

Cheers