Looking for Banners and Textual links on Bitcoin related websites

I'm currently trying to get an idea what's the prices of Bitcoin related websites/services that can put banners and/or textual links.

I need to get an idea of how much traffic there is on a site considering it's the most prominent location available (not footer "link exchange" or some other type of "link exchange").

I realize that not every Bitcoin site/service these days has a lot of traffic, but those are still interesting to me, as well as high-volume traffic sites.

I'm not a marketing/media buyer, so I'm not really familiar with all the terms except the most basic of them (PPC, PPM, etc').

Private messages are obviously welcome as not everyone want their information to be out there for everyone to see. If you decide to PM me, I promise that I won't disclose the information directly (i.e. saying this and that offered me this). At this point I really need to understand what are the general costs and what would a bitcoin related campaign would cost.

I'm able to pay in USD and BTC.