Sardines packed in water or olive oil (if that exists), and no added salt. There are many brands to chose from. It depends on if you want wild caught, or fair trade or something special like that. I bought a special one before and it was $3 or more for one package! Now I just get wild caught sardines whole at the Mexican market for less than $1.50/lb. I caught a sale and they were $1.19/lb. There is also canned fish in big cans (like soup cans). I’ve seen mackerel and salmon and some other kinds of fish in 15 oz (approx) cans.
