To change the order of your products on Marketplace:
Click on Settings from the Navigation Bar
Under Features, select Marketplace
Click on Sort Products under Set user-facing order
Choose to list your products by price, recently added, or manually. If you'd like to customize the order manually, drag the Plans to change the order.
You can also change the order of your Products directly on the Marketplace page:
Click on Marketplace, then Products from the left-hand menu
Click on the three-dot menu on the top of the dashboard and select Set order
Follow steps 4 - 5 from above
Need more info on Marketplace?