So we all know about information products such as ebooks which can be sold online via digital downloads.

Let's say I already have a website to sell specific information products in PDF format. Who can recommend a fully automated 'setup and forget' system (including payment gateway) for selling the products and accepting payments directly into my account without me having to process each order manually?

Which automated platform and payment gateway is best, including for accepting bank payments (from customers who do not use their debit cards/online banking for transactions)? And I hope this payment gateway can be integrated into an individual merchant's site without requesting for business registration certificates and such requirements? Any ideas on this?

Any ideas?