HOW TO PURCHASE OR SELL BOOSTERS?
You can find all your boosters, and gems in your Inventory.
Read more about the boosters:
In the inventory you can purchase 1 or 10 boosters with the green + button.
If you'd like to sell your redundant boosters you can do that with the red - button. (You can sell 1 or 10 boosters at a time.)
IMPORTANT NOTE: You can not sell your Season Point Saver Boosters.
In the inventory you can find your GEMS too.
To know more about the GEMS read our article about how to get them.