This is an example of paid course and includes a sample lesson.  LearnDash supports seven different ways to sell courses:

1. PayPal
2. Stripe
3. 2Checkout
4. Shopping Cart (WooCommerce, Easy Digital Downloads, Exchange, Jigoshop)
5. Membership plugin (PaidMembershipsPro, MemberPress, Memberium, iMember360)
6. EventEspresso
7. GravityForms

Key features demonstrated in this course include:

• Purchase process for a course using PayPal or Stripe options
• Articulate Storyline example
• Sample Lesson feature