Best High End Copywriter?

I'm currently seeking a strong copywriter who writes high-end material such as eBooks and blog posts. Due to the topics involved there would have to be a little bit of research on the part of the copywriter.

I'm willing to pay for quality, but would like to discover my best bang for buck.

Who would be your go to copywriter for high-end quality and what is their price?

Jon Benson @ $50,000 per sales page or sales video.

You get what you pay for.