I never have written that something is expensive or so but Denmark shocked me a little bit. If you're coming just straight from Germany or Poland you may feel that prices here are higher than there.
Or another thing - I thought that on island the prices for everything were a bit more than in other regions of Denmark.
I don't say that you won't be able to buy here anything but my suggestion is to buy necessary things for example in Poland before traveling to Nordic countries.
The crabs here seems to have delusions or problems with there measure. When they as they do meeting other crabs measure themselfs by seeing how fare there are between the claws to see if the other might be good for lunch. Some of the crabs think your toes look like a good little mouthful and explode in a illusion of grandeur as they try to eat you!