Walmart is the only game in town here if you want one for smokin. Everyplace else will trim the fat to a 1/8" and sell it at 4.50 a pound. to me it ain't no good with out the fat. I've never had an issue with them either.
Now I have used a brisket or two from wally world and I have no complaints so far. I just have to me better places to buy my meats. Sometimes you just have to do what you have to do to get the meat you need.
It should be the same brisket you get at Sams Club and I've purchased 100s of those without complaint one about quality or freshness. Expect it to come with the fat untrimmed. I personally prefer to smoke them that way. It takes a bit longer but I feel it keeps more moisture in the meat. Dice and slice the fat cap to get your rubs working down to the meat. It's self basting, so pop it in the smoker and pull when ready.