My sister has lived in the city during the last 5 years so i´ve used a lot of time crate digging in Amsterdam, but unfortunately i must say it isn´t the best place to find records, and especially not reggae. Rush Hour (www.rushhour.nl
) has a small reggae selection, most represses, but if you´re into different kind of world music such as afrobeat, latin ect. it´s a really nice place!
I haven´t visited it myself, but as far as i´m aware there exicts a shop in Nijmegen (about 1 hour from Amsterdam) which has a nice reggae selection, but i don´t know the name of the shop so i can´t tell you more. Maybe someone can tell more?
Hope you´ll have a nice time anyway!