First off, this is a really, really dirty dusty store. Bring a box of wet wipes with you before you venture out this way to grab up some cool deals.
I think some of the best deals to be found are in the frozen food sections.
You can buy case lots of meats. Such as baby back ribs and chicken for prices that are 50% to 80% cheaper than your local mass grocery. Excluding ElReys.
Row upon row of goodies can be found. Case lots of canned goods. *watch the expirations and the dents please.*
All in all you WILL find great deals. And it will become a stomping ground for you and your family for bargain hunting adventures.