Most flights coming from the USA into Amsterdam arrive at arrivals hall 3. It is not very clear when you get off the airplane where the bus tickets can be purchased. In the past you could purchase on the bus with cash from the bus driver. That is no longer the case on the N397 or the 300 as you can buy a ticket from the driver but you must be able to use a credit card or bank pass that works in Europe.
The Cedar Journal 