Panterzone is a multi-vendor marketplace: every confirmed member can open their own shop. Sign in, state in your profile that you want to sell, then submit a shop application.

1. Sign in as a member.
2. Submit a shop application (it goes to the back office for review).
3. Once approved, choose a membership plan.
4. Your dashboard opens automatically, then you can start adding products.

Full details in the documentation: Become a Seller.