Yep. About once a month I make a "Big Salad" for dinner using spring mix as the base. Top with grilled chicken or beef strips, or tuna, and other veggies/hard boiled eggs, etc. And some expensive cheese, of course.
Unless the pre-bagged spring mix is on sale, I find it cheaper to buy it at the salad bar. Standard price is about $2.99 to $3.50 for a 5 oz. bag. ($9.57 to $11.20 per pound). The supermarket salad bar is $7.99 per pound. $2.50 per bag is the break even point. If the bag is cheaper than that on sale, I buy it.