I want to create a website very similar to PayPal. It will be a site where users can send money via a credit card or bank account to other users as payment for goods / services or as a gift. When users buy goods I want the seller to get a shipping label with the buyer's address on it, just like PayPal. I would like for it to be able to be used internationally so that a user in the US can receive funds sent as euros and have them converted to US dollars. Also, I would want it so users can withdraw funds at anytime, very much like PayPal. Users can have their available balances sent right to their bank accounts or receive a check. It would need to be secure and safe. Also, I would like to charge a small fee for each transactions done.