Mp3 Player to sell beats on (PayPal integrated)

I need an Mp3 player made where my customers can browse through my catalog of beats, and add beats to a shopping cart (PayPal) and then checkout - After checkout, their purchased beats will then instantly be sent to their email address used in the checkout form. An email containing download links to the beats is what will be sent to them. So basically, I want a similar function of this player found on this page here (Not exactly all of the same functions, but very similar to,, we will discuss which functions I want included, and which taken out when hired.) - [login to view URL] * Also, I want to be able to include a "Discount Code" text area somewhere in the checkout process, so that I can run sales every now and then for my customers to take advantage of. * In order for me to add/change beats, discount codes, track pictures, prices, etc., I will need a very simple admin page made on my server I have purchased from bluehost. * Player and Admin Page must be completed no later than 4 days. * $400-$450 is my budget