Well, I checked out the Super Mercado today.
Interesting, nothing in english, and the folks who run the place don't speak much english at all.
They were more expensive on beans and rice, than the English grocery stores. But they were considerably cheaper on produce items.
They had alot of items that I didn't have a clue what they were, including what looked like huge chunks of cactus in the produce aisle.
I will not be shopping there to stock up, unless the other stores are simply out.
I got a couple more beans, rice and pasta today... inch by inch!