Absolutely!

Case:
Imagine you are a money managing expert and you have created a spreadsheet that is rather complex but super useful and that you believe all your Students would want. In such a case you would upload that file which becomes immediately available for download once the Student bought that specific Course, i.e. paid in full.

Look for "course files" on the Course edit page.
You can easily use this as a marketing strategy and attract many people to buy your Course.