I discovered a new Russian food store in Amsterdam. And they sell dried fish at 7,50 euro per kilo. The fish is dried and salted and you eat it as a snack with a glass of cold beer. The one fish I bought cost me 75 eurocent. [ update: the fish is in fact herring ]
These fish are pretty dried out and you need to peel, or break, off the skin and bones with your hands.
What's left is some dried and oily fish meat, salty and damn tasty. It's a great alternative to crisps.
Open: Mo - Sun from 10:00 AM - 10 PM.