Simple List Auction Script

Simple List Auction Script
I want to be able to auction off banners or listings for some of my sites. This is not a full auction site as users are not required to generate listings. All listings will be controlled by admin. I want a payment link to paypal on completion.
An example can be found at socialoomph.com but you have to have an account to see the Banner Listings, its free to open an account.

So I need to be able to post a listing, set the time to close, max bid should be included if possible.

Let me know if you have questions.

Need quick turnaround and good price please.