I would suspect that the sliding Euro is a contributing factor. Suppose the n900 costs x Euros when it was released and the price in Euros is the same today. When the device was released (Nov. 19, 2009), 1 Euro = 1.4986 USD, so I would have to pay $1.49886x. Today, 1 Euro = 1.2182 USD, so I would have to pay $1.2182x.