I think location is enough, and I didn’t fill out the location format poll because I believe a third option, in-game navigation, is best. What I mean by that is compass indicators or an atlas-like experience showing you request baskets and shop stands for a given item.
It isn’t really about location even, it’s about having “AoE All Adjacent” awareness of the market opportunities in your immediate area. Running into and out of each store to see if they deal in the item you are interested in is tedious. It was worse when portal load times were a constant part of the experience but malls aren’t perfect either. There’s no guarantee of shopkeeper retention. So the mall must sprawl to accommodate the next wave of shops, 75% of which will ghost out of business in the first month.
If you think of Gyosha Mall’s greatest innovation, adding icons outside stores to designate if they sell forged gear or food, you will see the power of having greater awareness of the market opportunities in your immediate area.