Thanks for mentioning the What Are You Looking For Group. However, its aim is not to provide a general shopping guide. That will be done by a separate "Where Are The Best Places to Buy Stuff" group. It will have posts and comment threads by OSW members about the best places to buy specific types of items, like landscaping, structures, hair, etc.
I'll start the group soon as a benefit to OS shoppers. But also, I will use the information in a concrete way. My soon-to-be opened shop Marche Noir (the Black Market) already has a "Recommended Shops" display for landscaping items with soon to be set-up HG TP boards for R. Lion and Flora. (Right now the vendors offer LMs).
In my mind, part of "sharing is caring" is sharing traffic. In fact, my shop doesn't want to be judged by traffic. I prefer it be judged by likes and comments. And Marche Noir won't stock items best found in other locations. What we will stock is a topic for the Grand-Opening announcement.