Low-Value Transactions & Prohibitive Costs
Thanks cinnamon9691, I appreciate your input and the super-helpful article. Our particular situation involves online music sales, where a single unit could possibly cost no more than US$1.00. The costs involved with regard to PayPal etc make the payment options prohibitive for such low value transactions.
Knowing what I know (which is not as much as you do), the cart option looks like a more sensible option as the 'transactional' costs appear to be lower - most money is spent upfront to purchase the application/package.
Do you have any further views on this?
Many thanks. :)