Hello,
you can see some of my facebook apps with links from my portfolio here.
Bids here are not allowed to be under 30$ so this is the lowest price that I can set.
I have experience in facebook apps and facebook covers. As I get the task is not really hard, as you need just to present your product with your company logo and pictures, no meaning it's not only in facebook.
So I will be glad to do the work for you.
Regards,
Pavlina Koleva