Pricing of advertising?

[peterpigman]

I have just been approached by film company who wishes to place advertising on my site, as I have never really done a lot of advertising sales I am clueless of what sort of price to quote. They are asking to add a banner ad and being quite honest it suits my site content perfectly.

Monthly stats are 64,000 absolute uniques
1,600,000 page views
135,000 visits

They are moving up a little every week too.

Advice and/or suggestions please?