Hi, I run a high traffic blog that gets currently more than 1 million page impressions per month. The niche is tech, mainly software, Internet and Windows tips. I tried selling direct ads on my own but I have some difficulties doing so, mainly because English is not my first language and I'm not used to the marketing jargon. I'm therefor looking for someone who would aid me in finding advertisers for my blog who would run banner campaigns on it. Fees are negotiable but I would be willing to pay up to 50% of the earnings of the first month or a smaller amount if you prefer monthly payments, 10% look ok. Prices for ad spots range from $300 to $5000 depending on their location. I'm willing to discuss the pricing scheme but I'm experienced enough to make a correct judgment on this part. If you are interested please reply in this thread so that I can send you the url of the blog.
Have you tried to contact with potential buyers? This would be the best and cheapest way for you. Do search the companies operated on your niche. Then contact with their webmasters or marketing managers. Let them know about your ad spaces and the prices. Then wait for their replies. If you are blogging in English, I think that you can probably communicate with those companies.