Question: How could a custom resource/Addon be added and sold to the end users?
You can do so with the help of following steps:
1) Login as Reseller in HC panel.
2) Navigate to the menu Hosting Plans :: Add-Ons :: Add Resource and add your custom resource.
3) Now set Default Unit Size as 1 and Default Recurring Price as per your need.
4) Then choose the method for Billing as Bill with Plan or Monthly Billing.
5) In the last step, add a plan from Hosting Plans :: Add Plan and this resource would show under Hosting Plans :: Add Plan :: Plan Resources.
Note: Billingshould be configured from Billing Manager :: Configure Billing before setting up price of any custom resource.
Now you are all set to sell the resource with your Hosting plans.