Best Practice for Buy in Set and Dismantle for Sales

Hi All SAP Masters,

We have a scenario that when purchasing an item as "set", in this set, it has a few components inside this set (something like a material BOM). Example, a machine which comes with several parts. However, when the user received this set from the supplier, the user would further dismantle certain part(s) from the set/"machine" and sell it separately to the customer as a component/"single item".

What is the best practice in the SAP process to be adopted?

Please help. Thank you.

Warmest Regards,

Edwin