Coffeeshop Kadinsky 2
Coffeeshop Kadinsky 2 is located on Zoutsteeg in a small alley right in the centre of the city which strangely can be quite quiet at night especially considering it runs between Nieuwendijk and Damrak which are some of the busiest areas in the city. During the day however this is used as a cut through between the two busy streets and does get crowded.
As they have 3 locations in the city you are likely to see similar weed and hash available. The prices at the top end are around €18.