The site I do marketing for gets 650,000 to 750,000 uniques per month (and about 19 million page views). It is geared towards young teenagers. I want to get in touch with individual advertisers who will pay a monthly rate to advertise on the site. I need the site to be earning at least $10,000 a month and Google Adsense alone isn't hitting that mark. I considered using other ad networks already. I tried adding Valueclick and had an unremarkable experience. I'm thinking that the site is big enough that it should be getting individual advertisers. My question is: Is there an advertising broker I can contact who will call related companies and ask them if they want to advertise on my site? Would this person work for a percentage? Thanks!
You could become an advertising reseller. As far as I know companies like bidvertiser and clicksor just resell ads from larger companies. So you could become a middleman and in the middle throw some of your individually located customers as well.
You could look for a VA (Virtual Assistant) to help you with that, and who knows, you may fins some that will work on commission, if that's the only way you can do it.