For a lot of fresh vegetables, we’ve found Costco to be less expensive than our local supermarket; but more importantly, their stuff is very fresh and lasts much longer for us than veggies from other places. We get romaine and the Spring Mix box from the ‘cold room’ there, and it has lasted up two weeks in the refrigerator if we don’t eat it up before
the reason it lasts is that it is irradiated.