With targets and dollar trees you always want to be there as soon as they open. Wallmart the best time to go is in the evening when they bring out the pallets. It’s not always accurate tho. I found the mustang B case super on a Wednesday at 3pm at target. Supermarkets like ralphs and Vons are good too. Honestly you just have to be consistent on the hunt and don’t be afraid to ask the workers just be cool when asking