Prices ending in 97 at that store indicate they wanted to get rid of the inventory to make room for other items, not sure the reasoning for it though, could be just newer games for the same system (since it also varies by location).
Edit: Looks like Walmart had a similar sale ($35-$40) for even more titles including bananza, so something is definitely different when compared to previous Nintendo pricing deals with retailers.
A few titles actually went in clearance at Costco which is somewhat rare:
https://kotaku.com/costco-sale-switch-2-games-cheap-pokemon-2000688792
Prices ending in 97 at that store indicate they wanted to get rid of the inventory to make room for other items, not sure the reasoning for it though, could be just newer games for the same system (since it also varies by location).
Edit: Looks like Walmart had a similar sale ($35-$40) for even more titles including bananza, so something is definitely different when compared to previous Nintendo pricing deals with retailers.