Never done this before, but anyway. My site gets just shy of 10k visits montly. I have 3 ads spots on offer. I am not sure whats a fair asking price, I was thinking $15 per each individual ad spot per month. Some spots are above the fold, but more details can be provided on request. PM me with your questions and offers - > PLEASE also show me your site, or ad as I wont be accepting anything and everything.