I am new to this site and was hoping to get some help with online advertising.....

Is there a standard CPM rate for online banner views (impressions)?

Using the leaderboard banner on this forum page as an example of the type and size of banner, what would a standard CPM rate be?

What about for pre screened or targeted market?

I know these questions may be vague but I am finding rates all over the place when looking at different website media kits.

As an example....If I have a fishing website with 100,000 unique visitors each month, what should I charge advertisers for a leaderboard banner that appears on all pages. I was thinking a CPM of $50 since the visitors are presumably all into fishing.

Am I correct here? Too high, too low?

Any help/feedback appreciated.

Thanks