Unfortunately it isn't possible to have products listed on Trade Me that are not in your own store. 

You cannot have a mixture of manually listed products on Trade Me with products we import from your Store.

It is one or the other.

Trade Runner imports all products from your store first, then you can choose which products you want to list on Trade Me.

You can choose by blocking the products in Trade Runner and these won't get listed

So you can have products in your own store that are not listed on Trade Me, but not the other way around.

We cannot take any existing Trade Me Listings and add them to your eCommerce Store.  The full product feed is one-way which means we cannot take any existing.