Plugin for sucure selling of online products?

Hi all,

Does anybody know of a plugin or way of hosting a downloadable e-book through wordpress?

I would need some sort of paypal integration so that when a ebook is selected the user is redirected to paypal to pay for the item and then redirected back to a download link or members area to securely download this product?

I know its asking alot but just wondering if there is anything wordpress related out there?

Thanks for any help with this.