Paypal on a pdf sales website

Hi, I have a website, where the admin uploads a pdf file, inputs authors name, title of the pdf and a brief abstract and hits the submit button. all that is backend. Now, on the frontend, all the info will be shown on the homepage, like author's name, abstract, and title of each pdf. upto here is complete. Now, i need paypal ability, like i would like to sell each pdf for $4 and want a subscription service for $4000, where the user can download unlimited pdfs anytime he wants. and a user registration, so that he can download from his member area. thanks for bidding ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform Paypal, PHP