That's a killer buy. After seeing this post, I stopped in at our CostCo to take a peek before buying a membership. They only had 3, smallish briskets that did not look very good and they were 4.79 / lb. Called the butcher's shop and they wanted 4.99 / lb. and probably (I have not seen them) have much better quality.
Tell whoever is stocking those shelves to transfer to Greenville!