Need script programmed

I need a script programmed that allows members to purchase advertising space.
There will be a certain amount of tiers (banner ads, text links etc).

Each will show for an alloted time. I want the script to show when their ad would be placed live.

Will be away for the next 24 hours but please pm me or if you know of a script already....

 

I can do this in around 1 week for £45. Contact me if you are interested.

Thanks