Be sure to look along the end caps throughout the store and on the top shelves as well. On Sunday I found a display case on the top shelf of the toy aisle, and last night I almost walked empty-handed out of a store that had a full display case of 12 figures near the front checkouts. It was just luck that I looked down as I was passing the display. And both of these stores had at least 1 Rick on a peg in the toy aisle that had been there for a few days.
Thanks for the tip, I finally found a full display of these at Walgreen's today too, on an island between 2 aisles. If I hadn't known to look I would have easily missed them. They had 2 Andreas, so I was able to get a less googly-eyed one. Wave complete!