Fleeting
Uno de los últimos colgados de toda la vida en Reykjavik
An old local corner shop. It's a little bit interesting to visit. They don't have a bar code system, which is an interesting and somewhat nostalgic experience.
Alot of the groceries are past their expiration date.
The best
This is a must. Smalest "merchant on the corner" north of the Alps and always time for a little chat. You will be surpriced how many goods you can find. Look for pictures on google.