The glory days of Amsterdam mongering are long past. You’ve got three levels of action going on - the RLD with the booths, the private houses, and outcall agencies. The booths will run you €50-75 for half an hour of mechanical covered half/half. The houses like Golden Key, Club LV, Park 118 etc. are €150-300 for much the same, and the agencies are probably your best shot at GFE (https://www.dreamsanddesires.nl/ is a good one) at €350.

Honestly if you have the time and inclination you’re much better off taking the ICE train into Germany. You can be in Cologne in 2.5 hours and have many more options. FKKs are €70 entrance fee and €50/€100 for half/hour GFE with all the Romanian models you can shake a stick at, and is the home to Pascha which is one of the largest brothels in Europe (150 girls working 24/7). Make the pilgrimage