Socialist Groceries?

I randomly wondered,

Socialists how would you run a grocery store? I think it is time to ask a question where if it is answered it can help us have a relatable vision of what socialism is meant to do.

What I understand is that usually in a retail store you will have to contact suppliers to get things unless you are the wholesaler.

What do socialists think of the model where some stores are the wholesaler and you need a membership to buy things in it?

In addition, how would wholesale purchasing work if we switched to socialism? Would it just be integrated? But how would this work, and how is this better than the usual way?

Lastly,

Would there be prices on the items?