It is ungraded, sourced from Mexico. Locally in Arizona, most carnicerias and Mexican supermarkets carry a lot of Mexican beef.
I will say that the meat trimmed a lot better than what you would get at the local Safeway and Kroger affiliate.
All of the people I have been buying for love what they are getting and I think that the steaks are excellent. And when they are priced at a lower price than 80/20 ground beef at the major supermarkets, why not try it?
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When we are shopping, we use a lot of different stores to source our groceries. As a general rule, we always shop when we are out and about. We never make special trips to groceries. If we need something between trips, we borrow from neighbors and they are willing because we are supplying them with free salvage produce from the Borderlands Food Rescue.
In the coming weeks, we will be in Phoenix which means that we will stop at two Korean markets and stock up on ground pork and beef. We will also hit Nogales around Christmas time and we will pick up 10# bags of chicken thigh quarters for $0.39-0.49/ lb. the quality is not first rate as you will find broken legs and an occasional extra piece but since most of that chicken will be stewed or pulled, that is not a concern.
I found a new salvage location in Tucson that sells a lot of the Starbucks coffee beans and ground coffee for $4 per pound. They have deals on twenty or thirty different premium and restaurant branded coffees.