Grachtengordel and Jordaan are monument-constrained trophies where the VvE minutes matter more than the listing text; Noord, Nieuw-West and Zuidoost are the volume book where erfpacht ground-lease terms move the price as much as the bricks.
Erfpacht is the Amsterdam-specific diligence: prepaid decades versus indexed canon changes the bid by real money. Conversion and buy-out schemes have shifted more than once; read the current canon, not an old explainer.