All my life I have been in the habit of picking up a few cans of sardines every now and then. King Oscar brand is wonderful, but expensive. I did find a nice brand for under a dollar, "Brunswick," Product of Canada. I pretty much only get the packed in mustard variety. Another low price brand is Beech Cliff, but I did not like them at all.
A funny sardine related story: A co-worker said to me "Oh if you like sardines, you'll love oysters!" He bought me a can. NOT! The oysters were the most disgusting thing I remember ever eating. I nearly turned green. He said, "Funny, I like oysters, but don't care for sardines."