This note is more of a question of: please locate and add the tag to Rabbit Traxx.

The tag to note that no item on the shelf has a price listed. Generally in the USA, stores list prices. In this store (Rabbit Traxx), one needs to ask the clerk "what does this cost" for each item. 

For a specific example, bottle of water was $7, and one doesn't know until rung up at the register.

I would expect a tag similar to: pricing=by_request (with other values of: on shelf, on menu; in app; haggling required; etc)