There are two by the Scotia Bank.
If you stood on the Scotia steps and look toward the bay there is a small road between you and one of the "Chinaman" stores.
Another "Chinaman" store is kitty corner from the bank steps and directly across the main road from the first shop I mentioned.
Does that make sense?

There is another "Chinyman" store up by Sun Island outlet (near Canoe).
I haven't been in that one.

As far as paying, you must have been there at a busy time.
Normally you just pay at the counter - like a Mom & Pop grocery store (do they still exist in the states?).

Beer/Booze prices are best at the "Chinyman" stores (or so I've been told - and it does seem that way).