I haven't settled on a figure yet. That will depend on how much time I will have spent on completing the full course.
As I write the course and develop the LBaP! game, the concepts I include will often expand or I see an opportunity to add something to the game to cover an additional topic that wasn't initially planned. For example, after I wrote a lesson on implementing collectible coins and updating the HUD, I decided to add a shop to the Home Town scene so the player can spend those coins. And I can also cover topics like implementing menus with selectable items to buy for those that want to include a shop system in their own games.
Each takes me about 20 to 30 hours to make so it's difficult to determine what kind of price I should put on it at this time, unfortunately. But the first 6 lessons will stay free and will be enough to get anyone settled in to making a platformer on their own.