Cheapest

Has anyone happened to price match diapers at different stores? I'm a first time mom and I really only go to the dollar general and Walmart but I'm curious if diapers are cheaper at other places because it may be worth shopping at other stores.. Has anybody purchased diapers from krogers? It's a grocery store so I'd assume they'd be more expensive but I've noticed they give coupons. Is it worth it with the coupons?