Auto publicist on bulletin boards

I need a poster for the bulletin boards. You have to pick up the boards yourself. And write a script in PHP to autopublish ads with simple management.

Requirements for boards:
- region: Russia, Ukraine, Kazakhstan
attendance of at least 1000 people per day
- not giants like avito, etc.
- without excavating about the quantity and quality of ads
- free of pre-moderation

If the ad is added, it should stay there.

Write offers for the price and 2-3 boards of the appropriate quality so that I know that you understand what I need. In the real program, you will need at least 50 boards.