Organic spring salad mix, fresh spinach, sliced fresh mango, medjool dates, avocados, organic Kirkland coffee, Maranatha almond butter, Land o Lakes half n half, protein powder, lamb chops and boneless lamb roasts, organic ground beef, crumbled feta cheese, other speciality cheeses (their imported Italian fresh mozzarella is the real deal!) --these are staples in our Costco shopping, and there are just two of us in the household.
On vacation (not usually while at home) we buy the prepared chicken salad, pizzas, hummus, frozen "gourmet" raviolis that have their own excellent sauce or seasoning packets inside, potstickers, veggie burgers, chicken sausage, multi-grain wraps.
When we were in Hawaii, Big Island Costco, we found an outstanding salad dressing that had ginger and I can't remember what else--omg, was it good. We barely used half the bottle even though we had salads every day, and used it for marinade, but it was a total bargain even though we "wasted" half of it. Could not find it here on the mainland and now I can't remember the name of it. When we get back to Hawaii I'm going to figure out a way to get some of that home.