Where is the best place banners? How to promote a website?

Hello!
Maybe someone can tell me where possible to find the base sites of commercial themes, where publishers are ready to place my ads, banners and video ads?
How to negotiate the price for such banners?
I have sites on various topics of commercial services. How to advertise such sites? I need quality traffic? SEO not yet give a good effect.

See original post by Solodisef