Hi Mary
Paypal is certainly a perfectly effective payment gateway, but we're looking hard at options for commerce & enrolment off-the-shelf tools.
The payment option at the end of that could be anything - not especially bothered so... paypal, authorise.net etc all fine.
What I was keen to hear about (but perhaps no one really uses moodle for paid access?) is about the front end customer enrolment and fullfilment process. (Arrive at page, choose a course, make payment, get enrolled or o on a waitlist to be enrolled)
That sort of thing?
D