Different stock values for Shopify and ebay

Hello,

I couldn’t find a solution to a Shopify site we are currently developing:

  • Customer wants to integrate with ebay (other apps will be added later on)

  • Some of the products will be synced with only ebay

  • Some of the products will be sold only in ebay but not in Shopify

  • Some of the products will be sold on both Shopify and ebay

  • All the inventory control will be done in Shopify

  • The products which will not be available in Shopify should not be displayed in Shopify. We are thinking of putting them in to a seperate collection say “ebay Collection” and they will have positive stock values but should not be displayed in the search results of Shopify Online Store.

  • The products that will be both available both in Shopify and ebay to be placed to several different collections and the inventory to be updated accordingly.

Thank you in advance.