Random Paypal Script

I want to have a site where people will buy 1 random item at exemple $9.99. I want a paypal button where after payment the buyer receive 1 item after IPN verification.( Script will randomly send 1 item in the list added in admin) What i need is that the script randomly send 1 item after payment. I need a simple template with a index, header,and footer php I want a admin section where i will be able to add many items to be download after payment,a button also to edit the price of the paypal button in main page, 1 logout button, 1 button to add paypal email. For more infos contact me