Comparison shopping
From YPPedia
Comparison shopping is a feature on all ordering interfaces, activated by clicking the Comparison Shop button when ordering at a shoppe or specific stall. (It is turned on by default if ordering in the foyer of a bazaar). When a pirate uses this feature, the price of the item at all applicable shoppes and stalls on that island will be queried, and a list will be displayed showing the least expensive items by default. The list may also be sorted by duration. An order may then be placed for the item at any shoppe or stall directly from that display.
Historical notes
Comparison shopping has occasionally been controversial, as it takes some of the advantage of visibility away from shoppes.