Virtual Shop in Gear VR Unity Apps

Hi

Apologies if this thread is in wrong section.

We are working on an app which has an e-commerce system dealing with physical goods. I have few questions related to this:
As e-commerce solutions are not allowed in Oculus store, is there any exception for an learning app which has a small module/store?
If it is possible then IAP would be enough for physical goods or do we need to use some external system like PayPal etc?
Is there a way to make transaction/payment in immersive view?
How would it be approached in Unity from development point of view?

Thanks