Page is a not externally linkable
vincevincevince - 12:32 pm on Aug 5, 2008 (gmt 0)
Recurring billing would then be handled by PayPal and you would retain the details of the link in the PayPal subscription details.
A private page (http authentication should be fine) might contain a one or more PayPal subscription buttons. Being provided with a username and password, your customer could fill in a short form with his link details and then make the purchase.