someone wants to advertise on a site i have, a 468 banner on the main page. traffic is a trickle, haven't done much promotion but has a PR5. sender wants to know how much i charge.
If you have the time, i would put adsense in that spot for a month - see how much you can make from adsense and than charge 25-50% more than you can make with adense. This way the advertiser saves and you make more - but Google loses.