Of course its getting cheaper, this thread is a total waste of time!
Ive never heard of a single piece of technology that didn't go down in price with age, if they didn't we'd all be paying thousands for a dvd player or lcd tv, its called progress, if you brought your n900 as an investment then you need your head looking at, if you want to make price comparisons then you need to use something released at the same time for a similar price.
Everyone knows (except op it seems) newer products cost more, you pay a premium to be among the first to have the newest technology!