Adi, I have a couple questions…
1. Can a member only be associated with one store or are they always associated with the Website?
2. Can pricing be hidden from non-members? (requires login)
3. Can member sign up be restricted per store?
4. Can admins add members?
(note: members = users not admins.)
I think you can see where I am going here. But if you can restrict pricing visibility for logged in users only. And if you can restrict the member creation process for admin only… then you should be able to create a store with specific pricing only available to specific members.
I am not sure this can be done.