I think you forget that the first Xbox saw massive price cuts fairly early in it's lifetime.
In the US the 360 got only one tiny 50$ cut in almost 3 years which is really nothing.
And i think also in europe the first one was about 100€ cheaper at this point of its lifetime than the 360 is now.
At least i bought mine for 170€ back then (awesome Ninja gaiden Bundle!), must have been around 2004 or something, maybe even earlier.












