You can now set a Minimum Cart Total on your Shop. This allows you to restrict any orders below a certain value.
How to Set a Minimum Cart Total
If you need to restrict the customer checkout above a certain value you can now complete this via the Settings > Cart/Payment menu
Adding a value into this option will stop any customers checking out from your shop below a certain value. For example, if you set a minimum total order amount as £50, any customer purchasing £10 worth of products will not be able to checkout.