Not sure if this is the best place to post this but I was wondering how you go about handling private ads on your website? I assume you have some sort of contract with the advertiser. Does anyone have a contract template or some kind of agreement that they use with all of their clients? What about payments? Do you all handle payments through paypal?
You could set any terms and make a deal by email and be paid by paypal. You can make it is informal or formal as both parties are comfortable with. I believe DigitalPoint itself has a service that could help you with this which may be more what you are looking for: http://advertising.digitalpoint.com/