Originally Posted by
Dovster
I prefer not taking the large one up and down stairs but have no problem in standing for 15 minutes. Thank you all for your answers.
One other question: Where do I buy the tickets?
At the airport, there are machines, as well as ticket windows near the entrance to the trains, before you get on the escalator. At Centraal Station, more or less the same setup as you enter the station from the main doors. If I recall, the machines are right in the middle of the entry and the ticket windows are off to the side.
I don't think you'll have any problems finding tickets at either location. When you arrive at AMS just follow the signs toward the trains.