To view the stores that have the most items in your Wanted List, visit My Wanted List
and click the "By Shop
" tab, then change the "Sort By" drop down list to "Lots Unique". The stores that have items on your wanted list will be sorted by who has the most on top.
Here's a quick user-made tutorial on YouTube that we found helpful: https://www.youtube.com/watch?v=bX0azI-U5jI